lost mouse control of system while resizing nautilus and Chrome

[Eli]

I resized Google Chrome (then I tried reproducing the issue with nautilus, after a system reboot), by holding the corner of the window (the appropriate cursor showed up, for resizing the window), and resizing it, but pushed the up/down arrow of my mouse (I think it's called MOUSE 4/5, in Java, at least) before letting go of the primary button (left click).

After that, I could not hit SUPER and get the dashboard to show up; I could not lock my account (using (left control) + (left alt) + "l"); my mouse cursor could move, but I could not move it out of the current monitor; I could not click, or scroll on any window, the doc, the desktop, or anything; using (left control) + (left alt) + (delete) was buggy, because I could not use my keyboard or mouse to control the options or hit enter (but using (left control) + (left alt) + "l" let me exit the screen);

I could get to the terminal using (left control) + (left alt) + "t"; I can switch Windows using SUPER + (number on the doc) and using (left alt) + (tab) and using (left alt) + (tab) + (left shift); I could use the keyboard for the current window.

(I haven't really messed with the keyboard shortcut settings, they're all default (except, SUPER + "E" open nautilus in my home directory)).

I was expecting me to be able to lock my account (like it's supposed to), use Ubuntu dash, and to be able to click on the Desktop, and the cursor to return to the arrow, instead of being stuck on the resize cursor.

info:

lsb_release:
 Description: Ubuntu 16.04.1 LTS
 Release: 16.04

 unity:
  Installed: 7.4.0+16.04.20160906-0ubuntu1
  Candidate: 7.4.0+16.04.20160906-0ubuntu1
  Version table:
 *** 7.4.0+16.04.20160906-0ubuntu1 500
        500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     7.4.0+16.04.20160415-0ubuntu1 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: unity 7.4.0+16.04.20160906-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-47.68-generic 4.4.24
Uname: Linux 4.4.0-47-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 370.28 Thu Sep 1 19:45:04 PDT 2016
 GCC version: gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.2)
.proc.driver.nvidia.warnings.fbdev:
 Your system is not currently configured to drive a VGA console
 on the primary VGA device. The NVIDIA Linux graphics driver
 requires the use of a text-mode VGA console. Use of other console
 drivers including, but not limited to, vesafb, may result in
 corruption and stability problems, and is not supported.
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
BootLog:
 [ OK ] Started LSB: Speech Dispatcher.
 [ OK ] Started LSB: Set the CPU Frequency Scaling governor to "ondemand".
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Wed Nov 23 19:15:42 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
GraphicsCard:
 NVIDIA Corporation GK107 [GeForce GT 740] [10de:0fc8] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. [MSI] GK107 [GeForce GT 740] [1462:8a9e]
InstallationDate: Installed on 2016-10-24 (31 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-47-generic root=UUID=517ab258-d70a-44ad-868b-26f8a0a8050b ro iommu=soft quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/28/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: FA
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: 970A-UD3P
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrFA:bd10/28/2014:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rn970A-UD3P:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
upstart.unity-panel-service.log:
 (unity-panel-service:2043): Indicator-Appmenu-CRITICAL **: window_menu_model_new: assertion 'BAMF_IS_APPLICATION(app)' failed

 (unity-panel-service:2043): Indicator-Appmenu-CRITICAL **: track_menus: assertion 'IS_WINDOW_MENU(menus)' failed
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.2
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Wed Nov 23 19:03:51 2016
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input USB OPTICAL MOUSE MOUSE, id 8
 input SINO WEALTH USB KEYBOARD KEYBOARD, id 9
 input SINO WEALTH USB KEYBOARD KEYBOARD, id 10
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.18.4-0ubuntu0.1