[cXF] Light and dark mode switch - Xenforo 2 1.1.0

Features:

• set light and dark style ID in the style properties
• set switch icon position (next to Search in navigation, next to Style chooser in the footer or both positions)
• switch mode is based on permissions (you can enable/disable switch mode for certain groups)
• set text on icon hover for each style (i.e. Light mode, Dark mode)
• set the icon for each style
• set the icon color and hover color separately in navigation and footer position
• set the page width (below the selected page width the switch mode icon will not show) for top and bottom switch icon separately