Besides the timeline buttons and color switch button being ready to have their changed shortcuts (when we implement them for these buttons) in their hint tooltips, there is no new functionality. This is merely to make the lives of translators easier.
This is the final commit of weird string IDs being replaced to actual sentences in Translations.pot
You can now choose how many columns you want your spritesheet to be, allowing you to export atlases.
ISSUE: If the number of columns is larger than the number of rows AND rows * columns are not equal to the number of frames, the result is weird. The exported image has transparent space on its bottom side.