Documents in help center `/keyboard-shortcuts` and in the app `?`
menu the shortcuts used by browsers for navigating back and forward
through the open tab's history, which are made to work in Zulip.
Also, updates `adjust_mac_shortcuts` to update the shortcut keys
for users with Mac user agents.
Fixes#18542.
In compose box, the "x" button tooltip text changed to
"Cancel compose and save draft" except when unsent
message length is short(<3).
Also in help(?) > keyboard shortcuts, text for `Esc`
changed to "Cancel compose and save draft".
The help center page updated with the above changes.
Fixes#21599.
Add `escape_navigates_to_default_view` as a bool setting in
UserBaseSettings model and implement it as a checkbox that toggles
the hotkey implementation of escape to the default view in the
advanced user display settings.
With /help/ documentation edits from Alya Abbott.
Fixes#20043.
This commits ports the `keyboard_shortcuts.html` file from
using the Django template to handlebars, essentially creating
a new file as `keyboard_shortcuts.hbs` within /static/templates
which is then rendered using info_overlays.js.
Fixes part of #18792.