QML UI: Fix error when closing the log window

When closing the log window, do not try to save the changes. This
should only be done when closing the DiveDetails.

Signed-off-by: Grace Karanja <gracie.karanja89@gmail.com>

qt-mobile/DiveDetails.qml

@@ -10,6 +10,7 @@ import org.subsurfacedivelog.mobile 1.0
 Item {
 	id: diveDetailsWindow
 	width: parent.width
+	objectName: "DiveDetails"
 
 	property string location
 	property string dive_id

qt-mobile/DiveList.qml

@@ -7,6 +7,7 @@ import QtQuick.Layouts 1.0
 
 Rectangle {
 	id: page
+	objectName: "DiveList"
 
 	Component {
 		id: diveDelegate

qt-mobile/Log.qml

@@ -10,6 +10,7 @@ import org.subsurfacedivelog.mobile 1.0
 Item {
 	id: logWindow
 	width: parent.width
+	objectName: "Log"
 
 	ColumnLayout {
 		width: parent.width

qt-mobile/TopBar.qml

@@ -42,6 +42,8 @@ Rectangle {
 				}
 			}
 			onClicked: {
+				if (stackView.currentItem.objectName == "DiveDetails")
+				{
 				manager.commitChanges(
 							dive_id,
 							suit,
@@ -49,6 +51,7 @@ Rectangle {
 							divemaster,
 							notes
 							)
+				}
 				stackView.pop();
 			}
 		}