feat: kanban style

[barredterra]

Reviving the style fixes from #17424

Changes

• Hide sidebar toggle
• Toggle full-width if more than five columns are visible (not available)
• Show correct cursor on column header
• Increase column height, add margin
• Increase card padding
• Set column background based on indicator
  • I know, colors are controversial, but many people find them useful for visual separation of columns. If you don't like them, just don't set any indicator color.

Before

After

Gray:

Colorful:

Kanban style

no-docs

[rutwikhdev]

Let's make this a check in Project/Kanban Settings? Since some people might prefer only indicators. Also the add button color looks hideous in some shades. It won't even show in gray bg. Try --bg-color instead.

[barredterra]

@rutwikhdev I fixed the "add"-button background, but wouldn't want to make it more configurable. You can already configure the colors. The requirement of seeing a tiny colored dot instead of a noticeable background doesn't seem plausible to me. Either you want to visually distinguish columns or not.

Btw, the failing UI test seems unrelated.

[gavindsouza]

Toggle full-width if more than five columns are visible (not available)

For my board with 5 columns, this added unnecessary scroll when they could take up the whole screen fitting nicely. Although I cannot recommend another value as it might just be arbitrary, a lesser number works better for me.