unexpected "Escape" key behaviours

[r10s]

the "Escape" key is working only in some situations, and not always predictable.

some inconsistencies:

• settings -> esc works
• settings -> chats and media -> esc does not work (there is a dedicated issue for that at Settings should be closable in sub-pages with escape key #3868)
• settings -> chats and media -> back -> esc does not work
• enlarge image -> esc works
• enlarge image -> context menu -> esc closes image and keeps context menu
• enlarge image -> context menu -> close context menu -> esc does not work

EDIT: some more:

• chat -> context menu -> esc works
• chat -> reaction menu -> esc does not work

[WofWca]

FYI some of these might get resolved in the Blueprint removal MR.

[maxphilippov]

Turns out none of these are solved by #4006 cause a lot of the dialogs are actually implemented as a switch between different states rather than stacking, but this looks like a pretty straightforward refactor, I'll probably do that after Blueprint removal PR is merged since there's a lot of Dialog-related code

UPD: I realized that ContextMenu-related things are probably actually solved by the PR, after I solve a little bug reported by Simon in #4006, cause ContextMenu is now a part of the dialog stack.

[maxphilippov]

• enlarge image -> context menu -> esc closes image and keeps context menu

Just as an update for someone who's gonna work on this. On current main after Blueprint removal:

• enlarge image -> context manu -> esc closes both image and menu
  Should close context menu first, I believe, so this is still a bug, just different behaviour

• enlarge image -> context menu -> close context menu -> esc does not work

Escape works now

• settings -> esc works
• settings -> chats and media -> esc does not work (there is a dedicated issue for that at Settings should be closable in sub-pages with escape key #3868)
• settings -> chats and media -> back -> esc does not work

These are fixed in #4205