More tweaks to query plan popups.
Renamed paramsSidebar to querySidebar, since we'll be adding other query options to it.
Corrected logger call.
Added <open-file> directive, and used it to add an 'Open File' button to the sidebar.
Fixed error when no rows are returned.
Fixes to semantic-ui's animated buttons.
Added <save-file> directive and 'Save File' button.
Updated <open-file> to be a 'replace' directive, and to set scope.loading correctly.
Added default file name.