[FEATURE REQUEST]:Improvements to Map watershed creating

[Enovotny]

Feature Request Type

• [X ] User Interface (UI)
• Application Programming Interface (API)

Is your feature request related to a problem? Please describe.

MAP improvements

1. have the mouse scroll zoom in and zoom out when the map is selected. ( same as google maps zoom in/out)
2. after creating a shape show the corners points
3. when editing is allowed for the polygon show the 4 arrows when you are able to move the map. show 2 arrows when you are able to adjust a vertex.
4. when hitting delete from the keyboard after a boarder has been created only the green reprojected region is deleted. Make sure both the green and blue are removed from the display. should work the same as the delete icon on the map.
5. I think when drawing the polygon it should be click and hold. move the polygon until you release the click. Go into power point and create a square. it should function like that. Same as editing for comment 3. see what happens in power point. I think those are the standards for arcview GIS as well. Each Time I try to create one I am not expecting the behavior that is being used on click once adjust the size then click again. that is awkward to me. Unless that is a standard in metview or the cavi that I am not aware of. Then keep it, but at least adjust the editing (point 3) to be like powerpoint.

related to issue #430