Selecting two full lines including line ends makes a selection from
line 1 to line 3 (ch: 0). This command used to sort three lines (1 to
3) which is not what I expect. This change makes it sort only two
lines if there are no selected characters on the last line.

It also fixes a fatal error if there are more than one selection on
the same line (the code used 'range' instead of 'ranges').

It also selects the trailing newline after sorting the lines so that
the whole lines are selected.

Closes #4419

This reverts commit 8dbb84f4.

Issue #3127

Closes #3803

Closes #3689

Closes #3684

Fixes #3449

Closes #3170

Issue #3127

As long as CodeMirror.normalizeKeyMap is called on them before they are
used. This interface is a little weird, but backwards-compatible.

Closes #2723

Bumping them for every release just adds too much git
noise and history blowup.

Issue #2542

Issue #2448

Closes #2348

Issue #2380

Issue #2354

"Shift-Ctrl-K"            Delete line
"Ctrl-K Ctrl-K"           Delete line to right
"Ctrl-K Ctrl-Backspace"   Delete line to left
Swapline                  scrolls with the cursor

Issue #2354

Issue #2362

Also add origins to the changes generated.

This makes it easier to update selections by mapping over them.