Terminal should treat the spaces at the right edge of a nonwrapped line as one region

In most other terminal emulators, when you drag a selection off the right edge of the text it selects the entire empty region up to the edge of the screen as a single unit.

There may be an impact, if we do this, on how we copy versus do not copy newlines.

+----------------------------------------------+
|TEXT TEXT TEXT                                |
|                                              |
+----------------------------------------------+

Selection:

              v cursor is here
 ##############
|TEXT TEXT TEXT                                |

drag right...

               v cursor is here
 ##############################################
|TEXT TEXT TEXT                                |

There's an argument to be made that copying TEXT TEXT TEXT should not have a newline and copying TEXT TEXT TEXT<SPACE> should.