Edge taps and swipes you choose to turn on

Hiding the bars by tapping the page edges and swiping from the middle of the page are now settings you turn on, plus fixes for the clock bar on iOS and the system bars on Android.

Improvements

“Hide the bars on tap” is now two separate settings: hide the bottom bar by tapping the right edge, and hide the top bar by tapping the left edge. Both are off by default
“Swipe from the middle of the page to open search and the index” and “The page fills the screen” are now off by default for everyone; turn them on in Settings
If you had hidden the page's top bar by tapping the left edge, it shows again, since that tap is now a setting you turn on
Turning on “Show the book window button” now opens the window right away, and the notice when you close it points to the book button in the bottom bar
The About page shows the full version number (for example 35.1.2), and it is added to feedback messages

Fixes

iOS: fixed the “Show the clock bar” setting, which had no effect
Android: the status and navigation bars take the page color and follow the app's night mode instead of the phone's
Android: in landscape on phones with a camera cutout, the area beside the camera takes the page color instead of showing an empty bar