Added prefixWithSlashes option. Settings panel now shows a matrix of three radio buttons for prefix options whitespace only, star, and slashes.
Added support for the /// slash prefix option in the commenter.
Using slashes as a prefix, typing /// to add a new line to the comment causes another comment block to be added. Instead, just ignore /// when the caret is already immediately before, after, or within a documentation comment.
Improved radio matrix layout which was inconsistent due to automatic cell resizing.
Handle prefix selection by setting the selected cell on the matrix rather than setting the state of individual radio buttons.
When HeaderDoc formatting is enabled, disable the slashes prefix option since it is only supported by Appledoc.
Enable the prefix with slashes radio button upon reset, otherwise it would remain disabled if HeaderDoc style were selected before the reset.