Paper save button, back to ctrl+enter save. (#25870)

* Revert "Change keybindings for paper (#25853)"

This reverts commit 4b56996fcd.

* Add a save button to the paper editing UI instead.

Resources/Locale/en-US/paper/paper-component.ftl

@@ -10,3 +10,5 @@ paper-component-examine-detail-stamped-by = {CAPITALIZE(THE($paper))} {CONJUGATE
 
 paper-component-action-stamp-paper-other = {CAPITALIZE(THE($user))} stamps {THE($target)} with {THE($stamp)}.
 paper-component-action-stamp-paper-self = You stamp {THE($target)} with {THE($stamp)}.
+
+paper-ui-save-button = Save ({$keybind})