Import/Export groups

• New feature: Import/Export groups from the extension preferences. Groups are added as closed groups.

  • Sync Tab Groups extension
  • Tab Groups extension (Import only)

• Change in UI:

  • Scroll bar won't move any more the tabs
  • Tab controls are showed only when mouse in on the tab
  • Controls take the full size (avoiding hitting next to and switch group) and change color when hovered
  • On a click on a tab/group, the window is closed
  • Presentation change:
    • Open groups: light background
    • Hovered group: dark background
    • Group in current window: bold
    • Tab active: bold