StartMenuItemWidget spaces
Variables to customize StartMenuWidget items margins and paddings
$gbc-StartMenuItemWidget-vertical-padding
Top and bottom padding of items in the start menu
Type: size
Default value: $ui-margin-ratio* 13px
Computed value: "7.8px"
$gbc-StartMenuItemWidget-indent
Left space for subitems
Type: size
Default value: "2em"
Computed value: "2em"