Add Collimation overlay graphics to live view
Adds QPainter graphics overlay drawn on top of the live view video frame. An arbitrary number of overlay 'Elements' may be defined which can be individually enabled or disabled. Each Element can be one of four types - Ellipse, Rectangle, Line, and the invisible Anchor. Each drawn Element has it's own name, enabled, type, size, color, offset, count, PCD, rotation and thickness field. Elements are stored in the userdb database.