FOV plugin enhancements

[AlexanderKrutov]

• Case #80 Quick search by equipment with filter (allow text input in dropdowns)
• Favorites: allow to add equipments to favorites list
• Case #33 ~New menu item in context menu "Zoom to FOV frame", if one or more FOV frames are available. "Zoom to FOV frame" item should have subitems with FOVs that are displayed. If subitem is selected, current zoom will be set to approproate value.~
• Case #34 ~Add "Copy" button to List of FOV Frames window. On press, it should make a copy of selected frame and open edit window.~