fix ipc return types

Modals/Clipboard/ClipboardHistoryModal.qml

@@ -188,17 +188,17 @@ DankModal {
     }
 
     IpcHandler {
-        function open() {
+        function open(): string {
             clipboardHistoryModal.show()
             return "CLIPBOARD_OPEN_SUCCESS"
         }
 
-        function close() {
-            hide()
+        function close(): string {
+            clipboardHistoryModal.hide()
             return "CLIPBOARD_CLOSE_SUCCESS"
         }
 
-        function toggle() {
+        function toggle(): string {
             clipboardHistoryModal.toggle()
             return "CLIPBOARD_TOGGLE_SUCCESS"
         }