Hide KRunner window when pressing escape

Otherwise the check for the unprintable characters return true
and the search field is focused.

BUG: 444240


(cherry picked from commit 810b0726)

lookandfeel/contents/runcommand/RunCommand.qml

@@ -255,6 +255,10 @@ ColumnLayout {
                 }
             }
 
+            Keys.onEscapePressed: {
+                runnerWindow.visible = false
+            }
+
             onActivated: {
                 runnerWindow.visible = false
             }