xF2 Add-ons [SVG]Sticky Threads Separation 2.1.4

Etting up fixed themes. Settings in style settings.

• Enabling color-sequencing of themes in the theme list, in a new and full widget
• Highlighting pinned topics in the list of topics, in a new and full widget
• Highlighting closed topics in the list of topics, in a new and full widget
• Highlighting closed sticky topics in the list of topics, in a new and full widget
• All styles are in the style settings