UI improvements

[mrruby]

• [ ] deprecation UI for each version
• [ ] new window is opened on another monitor
• [ ] Object has been Destroyed error after a bug in kando
• [ ] It would be nice to have some UI (maybe a dialog) to offer to update the UI for all instances of the same app at once instead of having to update it separately for each instance.
• [x] change app icon to not transparent one
• [x] change home icon to shopping bag
• [x] icon for resizing the window
• [x] go back to the background image instead of aniimation
• [x] background modal boundaries
• [x] add possibility to reset

[matthme]

• [x] Another one: This icon does not disappear after as successful update. Will need some cross-window communication to recheck for UI updates after having installed an update.

[matthme]

• [x] Add snackbar if UI has been updated successfully

[matthme]

• [x] I remember Norbu saying that these tabs/buttons should also contain names "Settings" and "Publish" I think: