B9035 tablesorter filter triggers save

Add class qfq-skip-dirty to input and textarea files that should not trigger the form change handler (eg. tablesorter input fields)

javascript/src/Form.js

@@ -74,19 +74,22 @@ var QfqNS = QfqNS || {};
             // and return. The `form.changed` event has already been emitted by `Form#inputAndPasteHandler()`.
             return;
         }
-        this.markChanged();
+        this.markChanged(event.target);
     };
 
     n.Form.prototype.inputAndPasteHandler = function (event) {
         this.inputAndPasteHandlerCalled = true;
-        this.markChanged();
+        this.markChanged(event.target);
     };
 
     n.Form.prototype.getFormChanged = function () {
         return this.formChanged;
     };
 
-    n.Form.prototype.markChanged = function () {
+    n.Form.prototype.markChanged = function (initiator) {
+        if(initiator.classList.contains("qfq-skip-dirty")) {
+            return;
+        }
         this.setFormChangedState();
         this.eventEmitter.emitEvent('form.changed', n.EventEmitter.makePayload(this, null));
     };