fix: flip user task implementation type isEdited default

Closes #1135

Author: Skaiir

src/provider/zeebe/properties/UserTaskImplementationProps.js

@@ -115,7 +115,7 @@ function removeZeebeUserTask(element, commandStack) {
 }
 
 function isUserTaskImplementationEdited(element) {
-  return getZeebeUserTask(element);
+  return !getZeebeUserTask(element);
 }
 
 function getZeebeUserTask(element) {

test/spec/provider/zeebe/UserTaskImplementationProps.spec.js

@@ -118,7 +118,7 @@ describe('provider/zeebe - UserTaskImplementationProps', function() {
       expect(implementation.value).to.equal('zeebeUserTask');
 
       // and also
-      return expectEdited(container, true);
+      return expectEdited(container, false);
     }));