lost code - option to disable automatic updates and showing usb mass dialog

Minor library fixes

This bug prevented the user from applying new font sizes, margins or line spacings to an opened book.
TODO: Fix ugly UI issue with highlighting

Previously, the user could highlight text and unhighlight it, but unhighlighted text would have stayed highlighted until the user would have done a next-page-previous-page movement. This commit fixes this issue.

It has been replaced by https://github.com/Szybet/inkbox-maps

This is to prepare for the new init binary, which is less tolerant than ash.

The font size slider now has 16 levels of different font sizes.