Improve scratch layer

[hedning]

• Make switch-windows scroll the tiling when a scratch window have focus (An alternative is including the scratch layer in the preview list, but not sure how it would work, or make sense)

• Make the scratch layer transparent when focus or pseudo-focus is on tiling #986

• Find a good hotkey for the toggle, <super>above_tab is probably best, but clashes with alt-tab group behavior. <super>escape is a good combo, but have some bad semantics and might clash with escaping from super-mode. <super>space is probably best used for the search/actions like Spacemacs or Spotlight.

• Add a toggle icon to the top bar, potentially including the icon of the most recently used scratch window.

• <super>number could work for quick switching with hints on super down.

• New windows should open in the scratch layer while it have focus

• Make a proper scratch layer group (or some tag) to enable coexisting with monitors that are shared between all workspaces (as they use visible on all workspaces)

[olejorgenb]

An alternative is including the scratch layer in the preview list, but not sure how it would work, or make sense

Might make more sense when we have a proper minimap. Then switch-next/prev could go through the minimap first, and then continue "down" in the tiling. The scratch layer preview could become transparent at that point, and if accepting a window in the tiling the scratch layer could be hidden.

[jtagcat]

Find a good hotkey for the toggle, above_tab is probably best, but clashes with alt-tab group behavior. escape is a good combo, but have some bad semantics and might clash with escaping from super-mode. space is probably best used for the search/actions like Spacemacs or Spotlight.

Since I have been using PaperWM, I haven't used Alt+Tab - so I see no problem in having the option.

[hedning]

Hehe, yeah, it's entirely possible to not use Alt+Tab much, but it can be quite useful to get quickly get back to a previous window after navigating long distances.

A toggle for only having scratch windows in the Alt+Tab popup could be useful. We try to limit toggles, but it might be reasonable here.

I've also been thinking about making Super+Escape work as an Alt+Tab for only the scratch windows, but that leaves us less options for toggling the whole layer.

[Thesola10]

Most of the unchecked bullet points feel out-of-scope -- "find a good hotkey" is a bit vague, and the top bar toggle suggestion could be superseded by #774, providing integrations such as Custom Hot Corners.

"Make scratch layer transparent while scrolling" will be turned into its own issue for visibility.

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🧹 Just going through and triaging old issues...