Mouse Pointer Crosshairs: "Crosshairs outer radius" Feature request

### Description of the new feature / enhancement

Sets a max distance to extend the crosshairs out from the cursor, instead of having them always fixed to the edges of the screen.

### Scenario when this would be used?

Instead of having distracting lines extending to the edges of the screen, you only have them where you need them.

### Supporting information

_No response_

No implementation file, test, or entry point is named. Start by locating the Mouse Pointer Crosshairs implementation and its settings or configuration path; done means the crosshairs stop at a user-selected maximum distance instead of always extending to the screen edges.

Written by the indexing model from the issue text.