icon font: adds css to kickstart generator
icon font: replaces underscored css classes with dash
generators: icons use css name instead of character code
thumbnails: use widget icon css classes instead of ip_icon
icon font: adjusts font size and fixes spelling mistake
column generator: uses icon that depends on the number of columns
updates test app
thumbnails: center icon in widget dialog
icon font: replace 'widget' prefix by 'editing'
updates test app
icon font: adds font files as app assets
icon font: adds new icons and classes
icon font: renames font files and adds default icons for widgets