Fix to show Property Panel when the mode is auto hide.

Property panel sometimes is not shown when the mode is auto hide and
focus is changed between existent windows.
It's a timing issue of PropertyPanel.set_properties().

Review URL: https://codereview.appspot.com/54300049
Do not let property panel follow cursor when it's always shown.

Review URL: https://codereview.appspot.com/60560043
Fix deprecated GtkHBox, GtkVBox and GtkStock since GTK+ 3.10.

Review URL: https://codereview.appspot.com/63750043
Fix deprecated GtkStock in ibus-setup

Review URL: https://codereview.appspot.com/65300043
Update translations.

Merged GTK+ translations.

Review URL: https://codereview.appspot.com/50490045
Merge github.com:ibus/ibus

Conflicts:
	po/fr.po