Fix for issue #6084: Move Find items to different menu

Fix for issue #6084: Move Find items to different menu.

Creates a new ~~Search~~ Find menu.

Moves appropriate Edit menu items over to new ~~Search~~ Find menu.

Adds a new ~~Search~~ Find menu item "Find in Selected File/Folder".  It is connected to the same command as the Project panel context menu "Find in..." menu item.