QA:Testcase i18n input method setup

Description

This test case is to check that functions and displays in GUI of input-method work fine.

How to test

1. Select System -> System Settings -> Input Method.
2. Check Enable input method feature, then click Input Method Preferences
3. In the IBus Preferences window, test the input-method such as the following:
   1. Change the keyboard Shortcuts and Font and Style in General label.
   2. Add,Remove,Up or Down an input method in Input Method label.
   3. Change Keyboard Layout in Advanced label.

Expected Results

1. GUI and windows should be popped up and displayed without error.
2. Every change should take effect.