[gfm mode] Fix exponential running time in regexp
Clear input field when disableInput flag is cleared

Issue #2060
[test driver] Clean up test selection
Clean up f5b8e1000dcd3d2e080ee5fd845eb333eefc04a5
[sql mode] Another indentation tweak

Issue #2065
[hardwrap demo] Remove debugging code

Closes #2080
[gherkin mode] Improve, add localizations
[gherkin] Renamed tokens for placeholder and table header