If one selects whole lines, as the sidebar makes easy, do not
add an extra line. Only move the end of a selection to the
beginning of the next line when not already at the beginning
of a line. (Also improve the surrounding code.)
Left click and drag to select lines. With selection, right click for context menu with copy and copy-with-prompts.
Also add copy-with-prompts to the text-box context menu.
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
Remove call to macosx.setupApp, which calls macosc.overrideRootMenu, which modifies
the menus, which results in two failures in the second round of the leak test.
Terry Jan Reedy
Nick Drozd
Tal Einat
Victor Stinner
Tal Einat
Tal Einat