Added right-clock menu to allow per-slide backgrounds.
Updated the context menu to use bootstrap icons
Added bg submenu
removed the "data" background attributes from the op ta ble
per slid bg preview
Render per-slide backgrounds correclty for impress, bespoke, reveal
Added ability to clear a single slide background
Added "clear" and "default"
Various bug fixes with the per-slide background
"translations"
Removed lang attribute
Preprocesses the stylesheet to scope it to the user' slide
Temporarily removed the "edit on keypress" as it conflicted with input
boxes
Does a global replace for the prepended class
Added slideContainer classes to generated presentations for CSS scoping
Merge pull request #188 from tantaman/css-fixes

Css fixes