allow apps to install to SD card
My phone is limited in internal space (unfortunately, the original ROM is totally bloated and leaves little space). Thus, I prefer to install most apps to my SD card. Apps have to have a bit flipped in their metadata to be installable to the SD card. Find more information at https://developer.android.com/guide/topics/data/install-location. I'm not sure how to set this in the f-droid metadata or else I would have provided a patch. I did inspect the metadata for some apps but did not spot the relevant flag. I'd appreciate a pointer.
Some of the apps that currently cannot be moved to SD
* [K-9 Mail](https://github.com/k9mail/k-9/pull/3541)
* Orgzly
* OneTimePass
* [SMS Backup+](https://github.com/supertuxkart/stk-code/pull/3357)
* FreeOTP
* FreeOTP+
* Starke Verben
* Easer
* [Fake Traveler](https://github.com/mcastillof/FakeTraveler/pull/7)
* Periodical
* BirthdayDroid
* Yalp Store
some big apps that are currently installed to internal memory by default
* [Tuxkart](https://github.com/supertuxkart/stk-code/pull/3357)
issue