modaltextedit: accept state as soon as focus changes

So that pressing tab will emit onAccepted and the dynamic text
always show the correct value saved.

Change-Id: I64326f1f836d611776bcfaf7993e6254e5d5aefe

src/app/commoncomponents/ModalTextEdit.qml

@@ -99,6 +99,7 @@ Loader {
             onFocusChanged: {
                 if (!focus) {
                     root.editMode = false
+                    root.accepted()
                 }
                 activeChanged(root.editMode)
             }