Cleanup chatkeyhelp and tests

autotests/chatkeyhelpertest.qml

@@ -31,12 +31,6 @@ TestCase {
         textItem: textItemHelper
     }
 
-    SignalSpy {
-        id: spyItem
-        target: textItemHelper
-        signalName: "textItemChanged"
-    }
-
     SignalSpy {
         id: spyUp
         target: testHelper.keyHelper
@@ -63,7 +57,6 @@ TestCase {
 
     function init(): void {
         textEdit.clear();
-        spyItem.clear();
         spyUp.clear();
         spyDown.clear();
         spyDelete.clear();
@@ -71,6 +64,11 @@ TestCase {
         textEdit.forceActiveFocus();
     }
 
+    function cleanupTestCase(): void {
+        testHelper.textItem = null;
+        textItemHelper.textItem = null;
+    }
+
     function test_upDown(): void {
         textEdit.insert(0, "line 1\nline 2\nline 3")
         textEdit.cursorPosition = 0;