Fix: #10539, and for context #6489, #6733, #6534
Reorganize and reword most of the settings to make it clear what actually ties into auto sync, and what doesn't. (Specifically, what happens when a pull attempts to sync forward or backward has nothing to do with auto sync, it applies in all cases; while the periodic sync *does* require auto sync).
The main point of contention, though, is that auto sync will now *always* attempt to setup network connectivity (i.e., on resume/suspend/close). Periodic sync will *not* though (the intent being that, if you use periodic sync, you're relying on the activity check to actually keep wifi on at all times)).
Since this may lead to a large amount of nagging about wifi toggles on devices w/ NetworkManager support, it is now *disabled* by default on those devices. (And given that it wouldn't have worked because of the lack of connectivity, that doesn't really make any practical difference ;p).
Additionally, given the fact that there's no way to make this behavior viable if the "before wifi" action is left at its default of "prompt", this feature now *requires* that to be set to "turn_on" (on devices where it can, of course); attempting to toggle it on will warn about that if necessary.
This change is retroactive (OTM).
Includes an assortment of fixes and cleanups, including migrating to the new LuaSettings API, which is why there's no longer a smattering of superfluous flushes.
Fix#10588
Regression since #10305
While we're there, rejig the FL toggle callback shenanigans so that implementation details don't leak through to *other* implementations.
(i.e., leave the Kobo mess in Kobo land, with only a minimal impact on the public API and its implementation).
(1) New "Book cover" button in the download dialog.
(2) Detect book that can be borrowed only (Internet Archive).
There is no support for borrowing, just showing a disabled button.
(3) Fixed some libraries, all of them work except Gallica.
Add a restricted but convenient mode showing BookMap like
in initial view, while still allowing chapter levels to be
tweaked. This allows getting back to this view with another
gesture to see the overall progress in the book, while
still having the normal BookMap in flat mode acting as
an alternative ToC.
Available as an action to associate to a gesture, and
with long-press on the "Book map" menu item.
Allows hairy-boxes amateurs to get small markers (under
the baseline) every 10 pages (with -/+ to get small or
medium markers, with optionally smaller ones every 5 pages).
Align page numbers (the vertical ones, on the left of
a BookMapRow) on the baseline of the BookMapRow, where
page slots rise from.
Also tweak the page number spike below the baseline used
in PageBrowser.
