App library context menu styling fixes

[maria-komarova]

• [ ] Change text style to Body, same as what applet menus have (styling for the context menu should follow examples in the Design system).
• [ ] Use selected state for the app icon button when the context menu is displayed.
• [ ] Change "Remove" inside the apps' context menus in folders to "Move to library home"
• [ ] Add "Pin to app tray" list item to the context menus. Link to Figma mockups.