Use contentEditable to allow modification via the the slider readout
Add support to the float slider
Add keydown listener to commit changes on <enter>
Ignore the event object for handleTextChange
Add support for parsing pairs of numbers for range sliders
Change _parse_text_input to _parse_value and update float range regex
Require base/js/keyboard and use keycode.enter
Merge pull request #6106 from chronitis/interact-slider-textedit

Allow text input on slider widgets