Tracing: Add type annotations to some functions

Change-Id: Ie82a12cb74d6315ab0bcb3efa1e88038ae4ed6f3
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/libs/tracing/qml/ButtonsBar.qml

@@ -38,19 +38,19 @@ ToolBar {
     signal rangeSelectChanged()
     signal lockChanged()
 
-    function updateLockButton(locked) {
+    function updateLockButton(locked: bool) {
         lockButton.checked = !locked;
     }
 
-    function lockButtonChecked() {
+    function lockButtonChecked(): bool {
         return lockButton.checked;
     }
 
-    function updateRangeButton(rangeMode) {
+    function updateRangeButton(rangeMode: bool) {
         rangeButton.checked = rangeMode;
     }
 
-    function rangeButtonChecked() {
+    function rangeButtonChecked() : bool {
         return rangeButton.checked
     }