Changes since 3.6:
- add ("normal" / non-inline) emoji search, by @eranl (#1765)
- needs emoji dictionary from dictionaries repository
- add optional gesture data gathering functionality (#1641)
- requires gesture typing library, see #2226 for info
- wrap selected text in braces and similar instead of replacing text (#1948)
- better detection of which emojis are available
- allow setting a separate emoji font (#1565)
- make showing number row in symbols layout optional
- reduce bad autocorrections for mail addresses
- fix space bar cursor movement for RTL + non-RTL text, by @eranl (#2199)
- don't trim selection when recapitalizing, by @devycarol (#2225)
- improve khipro combiner, by @qomarhsn (#2134, #2239)
- update Kaitag layout, by @alkaitagi (#2306)
- minor fixes and improvements