Bump i3 from `057f0cf` to `60bdfa3`

Bumps i3 from 057f0cf to 60bdfa3.

Commits

• 60bdfa3 Cleaner bg + slot textures
• 9971b8c Improve get_desc()
• 5a14116 Improve alphabetical sorting
• 222e04d Minor cleaning
• 8f4c9f2 Also for slots
• 37e0c21 Add support for bgimg_middle (better looking tabs)
• See full diff in compare view