The feed update routine which is now spread over several methods
in Fetcher, is now put into a self-contained KJob. This will allow
to re-use this job later on in e.g. gpodder sync, where it's
required to update feeds before syncing episode statuses.
This also makes the feed update abortable.
Lastly, but most importantly, the feed update procedure has been
optimized to minimize database transactions, resulting in a dramatic
speed-up. This is especially true for importing new feeds, which
will now be at least 5x faster on slow hardware.
This commit adds keyboard navigation to entry lists.
Selection of items can be done through keyboard (shift+up/down), mouse
(left, left+shift, left+ctrl) or touch (long press).
When items are selected, contextual actions will show up on
the page (useful for touch screens), or, alternatively, a context menu
with the same actions can be opened through right mouse click (useful
for desktop).
If a single entry is selected, then only the relevant actions will be
shown (e.g. only "Mark as Played" if the entry has not been played yet).
Additionally, (database) transactions for the actions have been
optimized. This was necessary to make sure that actions on large
selections of entries finish within an acceptable time. E.g. actions on
a list of 1000 items should finish within a few seconds (on all but
underpowered hardware).
BUG: 441764
Still to be done:
- Update Download Page to show partial downloads.
- Connect signals to Download Page to update whenever an enclosure
changes status. This is broken by this commit because
downloadCountChanged has been removed.
- This refactoring also includes a cleanup of a lot of header includes to
avoid circular dependencies.
- The error message will now be shown below the info message.
- Add database migration (for Errors)
