52377, 52035: Put back keyset mistakenly removed in previous version. Suggested by jrgm

suite/common/unix/platformEditorBindings.xul

@@ -5,6 +5,8 @@
 	 xmlns:html="http://www.w3.org/1999/xhtml"
 	 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
 
+<keyset id="editorKeySet">
+
 <!-- emacs delete keys -->
 <key id="emDelCharBWkb" key="h" control="true" shift="false"
   onkeypress="