Add keybinding and migrate to inline widget.
Auto resize to fit content height.
Refactor code to make clicking on gutter icon open the inline widget.
Switch to using lodash #find instead of for loop to locate first widget on this line.
Use toggleLineDetails instead of showLineDetails, move hide/show logic out of showLineDetails.
Move hiding of inline widgets into its own function,  and make inline widget hide upon change of that mark.
Merge pull request #40 from Mark-Simulacrum/add-keybind

Add keybind and change custom inline widget to Brackets' inline widgets.