This dialog will open if user keeps touch input active on a button from `bookBtnArray` for >= 500 ms.
'Pin' and 'More info' operations are currently not implemented.
A local books database is maintained at `/data/onboard/.inkbox/LocalLibrary.db`. It contains compressed JSON read by the GUI.
URGENT TODO: Fix `*** Error in '/mnt/onboard/.adds/inkbox/inkbox-bin': double free or corruption (out): 0x00648708 ***` error whenever we try to delete localLibraryWidget