Changes since 3.0:
- optionally suggest names of installed apps, by @devycarol (#1361, #1014)
- swipe to switch emoji categories, by @eranl (#1488, #1426)
- display toast after restoring backup, by @eranl (#1531)
- larger toolbar button and icon, by @eranl (#1556, #1412)
- make comma accessible in popups when showing TLD popups, by @eranl (#1594, #1573)
- add setting for default emoji skin tone (#817)
- add keycodes for left and right alt and ctrl keys (#1579)
- add key label "timestamp" for more accessible timestamp key
- understand special key labels for popups in simple layouts
- minor fixes and improvements