Add icons for file actions.

Change-Id: Ia687802f700e6d5509e90e4d79f91897478668dc
Add toolbars to MainWindow.

Change-Id: Ie70eb13e9d5253bf4485583592f1c37aafecff01
Merge topic 'icons' into master

3999b7d9 Add toolbars to MainWindow.
adef6fe6 Add icons for file actions.