AddChat and AccountSettings:
- When clicking the cancel button, if there's no previous back to go
back to, focus the main pane instead of doing nothing
AccountSettings:
- Always enable the cancel button, not just when the form has been
modified
AddChat, AccountSettings, ServerBrowser:
- Pressing escape will do the same thing as clicking the cancel button
- Rename ButtonLayout module to just Buttons
- Rename ButtonLayout into AutoDirectionLayout and move it to Base,
it's useful not just for buttons
- Rename OtherButton into GroupButton, which is now the base of all
other Buttons buttons
- Add generic (Positive|Middle|Negative)Button components, which are now
the base for (Apply|Cancel)Button
- Refactor everything about HBox, and adapt all the pages and popups
that used it
- Replace HTabContainer by HTabbedBox
- Make boxes swippable
- Make esc presses in boxes click the cancel button
- Make all boxes and popups scrollable when needed
- Replace generic apply button icons in popups
- Fix tab focus for error and invite popups
- Rework (still WIP) the account settings page:
- Use the standard tabbed design of other pages
- Ditch the horizontal profile layout, hacky and impossible to extend
- Add real-time coloring for the display name field
- Implement a device list in account settings (Sessions, still WIP)
