Mobile selection change

[nightwing]

A small fix to allow moving cursor by swiping spacebar on android.

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[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.12 🎉

Comparison is base (d53da8e) 86.21% compared to head (99713bb) 86.33%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5087      +/-   ##
==========================================
+ Coverage   86.21%   86.33%   +0.12%     
==========================================
  Files         548      549       +1     
  Lines       41716    41807      +91     
  Branches     6565     6577      +12     
==========================================
+ Hits        35965    36096     +131     
+ Misses       5751     5711      -40     

Flag	Coverage Δ
unittests	86.33% <100.00%> (+0.12%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/keyboard/textinput.js	77.01% <100.00%> (+1.06%)	⬆️
src/keyboard/textinput_test.js	99.59% <100.00%> (+0.05%)	⬆️

... and 10 files with indirect coverage changes

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[InspiredGuy]

could you please add tests for new functionality?

[InspiredGuy]

is this fix related to this issue #4178? also, is there a reason to add this functionality to android-only, is behaviour on iOS significantly different?

[nightwing]

It is indeed related, i remembered that there was a report, but thought it got closed by the autoclose bot.
The issue with ios is that there is another code used to detect keyboard arrow presses for ipad. I think it is not needed anymore, but i was not able to test, so left it as is for now.

[InspiredGuy]

Might be also related to #4304 - could you please confirm if this PR fixes this issue as well?

[nightwing]

This pr does not solve that issue, which is about mouse selection handles.