* Don't cut off text when regexp is long enough to require h scrollbar
(CM instance and entire inline widget automatically grow in height to
accomodate scrollbar when needed)
* Bold text for special chars in regex, making them easier to notice &
making syntax colors more obvious. (Note: the default Brackets font does not
support bold, so you get pseudo-bold chars that aren't the same width as
the other non-bold chars. For a single-line edit field this isn't a problem).
* Fix NPE when rolling over group whose ")" is last char in regex
* Fix bug where pressing Enter in regexp still inserted a newline
* UI nit: horizontally align sample text's 1st char with regexp's 1st char
- Use full width of inline editor instead of fixed-width text fields, via
a flexbox layout. (Down the road we could align the rows better by using
`display: table-cell`... but it'd mean more cruft wrapper tags in the DOM
to decouple item height from cell height).
- Add screenshot to README