TeXslate 1.0-alpha27

Hardware keyboards and small screens.

• Hardware keyboards: AltGr characters such as \ { } [ ] | ~ @ now reach the editor. Android reports AltGr as the right Alt key, and the editor dropped characters typed with Alt held (#11).
• Small screens: the editor font size can be set in Settings and is remembered, pinch-to-zoom included. The shortcut bar can be switched off. A new focus mode hides the top bar and the shortcut bar; compile and exit stay next to the Editor/Preview tabs, Ctrl+M toggles it (#10).
• Missing images when a single .tex file is opened: the error panel now names the missing files and points to opening the project folder (#9).

Assets: arm64-v8a = full edition (with biber), core-arm64-v8a = core edition, x86_64 = emulator build.