* @description Grabs the lat/lon buttons from the GUI and adds on-change events to them. It also adds an on mouse-over event to the AstroMap to grab the current mouse position of the user's mouse pointer.
* @description Grabs the lat/lon buttons from the GUI and adds on-change events to them. It also
* adds an on mouse-over event to the AstroMap to grab the current mouse position of
* the user's mouse pointer.
* @param {AstroMap} map - The AstroMap to add the control to.
* @return {Object} The div-container the control is in.