Cannot stop installing a new emulator device

[Jobin Raju George]

Environment on which this bug was seen:

Environment on which this bug was seen:

Ubuntu 14.04 64-bit desktop installed as a VM on VMware Player 6.0 on Ubuntu 12.10 64-bit desktop.
Qt Creator 2.8.1

May be helpful:

lsb_release -rd
Description: Ubuntu Trusty Tahr (development branch)
Release: 14.04

apt-cache policy ubuntu-sdk

ubuntu-sdk:
  Installed: 1.110
  Candidate: 1.110
  Version table:
 *** 1.110 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
        100 /var/lib/dpkg/status

How to reproduce this bug:

Open ubuntu-sdk. When the windows opens up, go to Devices -> Emulators and press "OK". The progress bar oscillates for a while untill all packages are downloaded and installed.

What did I expect:

I would have a stop button wherein I could cancel downloading or installing the packages before all the packages have been downloaded/installed.

Possible solution:

Keep a "Cancel" button, so that the user can press which will result in cancelling downloading/installing the packages.