feat: Add position option to tool dialogs

[DSCaskey]

This adds user preference option to position where the tool dialogs open on the screen.

Adds:

• Checkbox option to open on second monitor - default is unchecked
• Options to open at the Top left, Top right, Center, Bottom Left, Bottom right - default is center
• Option to set user defined offsets. Positions the dialog with X:Y offsets from screen's Top Left corner. If either offset is greater than the screen width or height, the dialog is positioned at the right and / or bottom edge.

Closes issue #1174