[fb] Skip current folder on select all

Added logic to skip current folder from the select all action
Disabled copy/rename/move/trash if the current folder is selected
HUE-2255 [fb] Drag and drop a file directly into the page

Enabled dragging files into browser for upload utilizing drop-zone
Created opaque layover for messaging (i.e., 'Drop files anywhere')
Added styles for upload status template to space out the pieces of information