Fix #299
Remove unused `using` directive.
Fixed minor issue with "Remove text for HI" + unit tests
Fixed auto-br issue when split was made at a blank at "max length+1" - thx XhmikosR (fixes some of #279)
nl-NL translation: minor corrections/improvements + new tags
nl-NL translation: spcorr + experiment (buttons)
nl-NL translation: preferences 1