PluginSpec platforms: It is "OS X"

Change-Id: Ibb3c2be1401b3c09d38f0fd689658b409ff52f7b
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
Bookmarks: Enlarge "Edit Bookmark" dialog width

Change-Id: Icd0b8e9720e4467cc66780b808cb4bf82a012938
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Bookmarks: Use a spinbox for line number

Change-Id: I42b00caf1d744d79af93e7100daa8fed5f8a29a8
Reviewed-by: Daniel Teske <daniel.teske@digia.com>