Maybe a dirty workaround. The design of the focus features is a highly inspired from standalone cameras, however it fails to take into consideration smartphone specifics. The "a" setting, as in autofocus, should work continuosly. When pressing the shutter, it must confirm proper focus exists, unless the user tapped the screen for a specific focus lock beforehand. Current behaviour: it autofocuses once and only once, then pressing the shutter takes the picture with that focus setting, regardless....
OpenCamera does not autofocus
On Samsung Galaxy S6, Opencamera v1.45.2, it now works. Checked camera API v2. TARTED app, to be safe. Able to up the photo resolution to 5312x2988 (16:9, 15.87MP, no burst). Photo taken and verified.
Apparently the option was removed starting with sfdisk-2.26 (2.25 still has it). A quick here: https://www.kernel.org/pub/linux/utils/util-linux/v2.26/ shows in the ReleaseNotes that the sfdisk command has been rewritten.
In fact I would strongly suggest removing the dialog timeout entirely and instead make the user acknowledge the completion. Why? Except MBR and small partitions, most operations might take a while. The user might leave the system unattended and return to check it's progress. Currently G4L does not keep the user properly informed about the completed operation under this scenario which is very likely for large disks/partitions and lack of information confuses the user unless he keeps a separate log...
Make progress information more relevant
Make status dialogs skippable
Wrong title after clearing pagefile.sys