Composer's table cell properties' dialog did not allow to reset width and hight and the switch between TD and TH did not work (regression): b=230165, r=timeless, sr=dbaron

editor/libeditor/html/nsTableEditor.cpp

@@ -2061,7 +2061,7 @@ nsHTMLEditor::SwitchTableCellHeaderType(nsIDOMElement *aSourceCell, nsIDOMElemen
 
   // Set to the opposite of current type
   nsCOMPtr<nsIAtom> atom = nsEditor::GetTag(aSourceCell);
-  nsString newCellType( (atom == nsEditProperty::th) ? NS_LITERAL_STRING("th") : NS_LITERAL_STRING("td"));
+  nsString newCellType( (atom == nsEditProperty::td) ? NS_LITERAL_STRING("th") : NS_LITERAL_STRING("td"));
 
   // This creates new node, moves children, copies attributes (PR_TRUE)
   //   and manages the selection!

editor/ui/dialogs/content/EdDialogCommon.js

@@ -122,7 +122,7 @@ function ValidateNumber(inputWidget, listWidget, minVal, maxVal, element, attNam
         element.setAttribute(attName, numString);
     }
   } else if (element) {
-    element.removeAttribute(attName);
+    GetCurrentEditor().removeAttributeOrEquivalent(element, attName, true)
   }
   return numString;
 }