1.850

- French and German virtual keyboard overlays

- Settings -> Input -> ST Keyboard Region

- Note: You need to use the correct French/German TOS rom for this to work.

- Add modifier key lock to virtual keyboard (alt/ctrl/shift will become toggle keys)

- Easier to type French/German keys

- Fix frontend argument passing (Arcbrowser)

- File browser will default to external storage directory when the base folder "/" is unaccessible.

- Changes to comply with Android TV guidelines.