Now that almost all actions can be triggered from outside the context
menu and are available for more than one item type, it's easier to check
for available actions dynamically.
... but don't trigger search if the key closes the editor.
Also get rid of the on_click of the saved searches root which has
already been removed on main.
... in favour of in-line editing. This is simpler and more ergonomic for
the user (and the programmer) but doesn't allow for editing parents
through text input (in the case of tags and decks).
Thus, disable renaming, deleting etc. for the current deck item.
As a consequence, editable is no longer needed as a field of SidebarItem
as it can be derived from its type.
- using :host-context(.nightMode) allows for applying the nightmode
scroll bar inside the component
- apply max-width: 100% to all element within editable, not just images
- Since we need to show this to new users until AnkiDroid is updated,
use a wording that doesn't seem so out of place to new users.
- Avoid mentioning syncing, since the user may not sync, and the
modSchema() call will allow the user to confirm anyway.
- Let the user know they can change their mind about AnkiDroid by
visiting the preferences.
- Rework V2 upgrade so that it no longer resets cards in learning,
or empties filtered decks.
- V1 users will receive a message at the top of the deck list
encouraging them to upgrade, and they can upgrade directly from that
screen.
- The setting in the preferences screen has been removed, so users
will need to use an older Anki version if they wish to switch back to
V1.
- Prevent V2 exports with scheduling from being importable into a V1
collection - the code was previously allowing this when it shouldn't
have been.
- New collections still default to v1 at the moment.
Also add helper to get map of decks and deck configs, as there were
a few places in the codebase where that was required.
