Move as much of the state tracking as possible inside VirtualKeyboard itself.
InputDialog unfortunately needs an internal tracking of this state because it needs to know about it *before* the VK is shown, so we have to keep a bit of duplication in there, although we do try much harder to keep everything in sync (at least at function call edges), and to keep the damage contained to, essentially, the toggle button's handler.
(Followup to #10803 & #10850)
* Enforce a minimal standby timer for the first standby after a resume.
* On Kobo, sleep a bit before standby.
This aims to alleviate race conditions causing visible refresh glitches on sunxi, especially when using an extremely low standby timer (i.e., below the defaults).
An attempt was made in the original code, but the whole thing was designed in the hope of actually switching to turbo, so it was super janky without it.
Anyway, we now actually have a sane way to set socket timeouts, so, use that, and set them very tight for now.
This is fairly critical right now, because the server is down, and the default timeouts are ~30s. That happens to be *above* the debounce threshold, so you can't even hope for that to help you. Meaning, right now, you get a 2 * 30s block on resume with auto sync. That's... Very Not Good(TM).
That becomes a single 2s one after this.
And add an OTM block to do a cleanup pass on existing DBs (which might take a while if you're severely affected, because we've seen reports of DBs north of 2GB).
* Enable before_wifi_action & after_wifi_action on hasWifiToggle platforms (which is basically all of 'em except naked SDL).
* Decouple restoreWifiAsync from hasWifiManger, because we can do that on other platforms (namely, Kindle. Probably PB, too, but WiFi is already a mess there, and I can't test it).
* Implement restoreWifiAsync on Kindle.
* Properly flag rM as hasWifiManager & hasFastWifiStatusQuery, because it is actually both of those (it uses our wpa_supplicant backend).
* Update the KOSync checks to take these changes into account, to properly disable auto_sync if necessary.
* Really made the Network* event signaling consistent. For realz this time.
* In an effort to make the whole beforeWifiAction framework somewhat usable there, we now assume connectivity is always available on !hasWifiToggle platforms...
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.
(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.
Export highlights for selected files.
Having a button "Select all files in folder", it is easy to export the whole folder.
So, closes#10402.
To keep even number of buttons, added a feature "Show selected files list". May be useful to check selections before an operation. Just a sorted list, no titlebar or popup menu, tapping a file jumps to its folder.
