Configuration page improvements

[448-OG]

• In the languages selection add a search feature in case users add many languages:
  • Configuration page
  • Header section dropdown to select language
• Support adding primary, secondary and accent colors in hex codes
• Support for converting images to multiple formats for faster performance like (AV1) but with fallback
• Use cached values in session storage to add to the input fields in case a user is navigating back to change a value
• Fix for firefox not loading the favicon dynamically