Changes since 3.8:
- allow switching app (settings) language in system settings, by @eranl (#2373)
- optionally swipe down on toolbar to hide keyboard, by @stanissay (#2303)
- add HCESAR layout, by @davidzx84 (#2360)
- inform about missing emoji dictionary when enabling emoji suggestions, by @eranl (#2364)
- extend Firefox work-arounds for additional Firefox forks, by @celenityy (#2366)
- fix issues with active gesture data gathering (#2375, #2380)
- minor fixes and improvements