CMS7-7807 Remove unused components
CMS7-7807 Update styling of the h1 element
CMS7-7807 Update link color
CMS7-7807 Update default panel colors
CMS7-7807 Panel colors as variables
CMS7-7807 Remove unused primary button from the demo page
CMS7-7807 Set a selected item by default in the tree component
CMS7-7807 Update styling of the Tree component