ktouch: Can't insert Tab in Training Window

[Bagas Sanjaya]

In the course which demonstrate this bug, I can't (legally) insert Tab character in Training Window.

The course in question only have one lesson, which is to test using Tab. When opening the course file in Course and Keyboard Layout Editor, the Tab is listed in "New characters" (thus doesn't highlighted in red in main edit box in bottom right). I inserted Tab in New characters field by Ctrl-Shift-U-9.

However, in Training Window, the Tab key isn't highlighted in keyboard visualization. When the cursor reach Tab, typing the key doesn't make cursor move, thus the key can't be inserted.

The bug is always reproduced.

Steps to reproduce:
  - In Course and Keyboard Layout Editor, import course attachment (testtab.xml)
  - Pick "Test using Tab" lesson and click Start Training
  - When the cursor reach tab character, type Tab key at your keyboard

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ktouch 4:19.12.3-1ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
Uname: Linux 5.4.0-33-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.8
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Sep 4 15:26:23 2020
InstallationDate: Installed on 2020-05-05 (121 days ago)
InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: ktouch
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.apport.crashdb.conf: [modified]
mtime.conffile..etc.apport.crashdb.conf: 2020-08-11T18:33:58.913741