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.
gettext complained that there's another string with the same text but
not plural and that is bad, so add a dummy context to make gettext happy
xgettext: warning: msgid 'Remove Podcast' is used without plural and with plural.
./qml/FeedListDelegate.qml:279: Here is the occurrence without plural.
./qml/FeedListPage.qml:249: Here is the occurrence with plural.
Workaround: If the msgid is a sentence, change the wording of the sentence; otherwise, use contexts for disambiguation.
xgettext: warning: msgid 'Delete Download' is used without plural and with plural.
./qml/GenericEntryDelegate.qml:294: Here is the occurrence without plural.
./qml/GenericEntryListView.qml:207: Here is the occurrence with plural.
Workaround: If the msgid is a sentence, change the wording of the sentence; otherwise, use contexts for disambiguation.
This adds "select all", "deselect all" to the page contextual actions
and adds "show podcast info" to the OverlayPage opened by clicking on
the overflow menu button on the cards.
This also adds correct use of plurals for the actions if more than one
item has been selected.
Context properties always takes in a QVariant, which means that
whenever you access the property it is re-evaluated because in
between each access the property may be changed as
setContextProperty() can be used at any moment in time.
