Mobile: disconnect model while updating dive list

If the dive list is connected to the model while the model is updated
with the downloaded dives, sometimes the UI hangs completely.

Disconnecting the model and then reconnecting it does add a fairly
noticeable delay on longer dive lists, so there are tradeoffs here.

Of course the obvious solution is to make reconnecting the model
faster...

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

mobile-widgets/qml/DownloadFromDiveComputer.qml

@@ -385,19 +385,28 @@ Kirigami.Page {
 				text: qsTr("Accept")
 				bottomPadding: Kirigami.Units.gridUnit / 2
 				onClicked: {
+					manager.appendTextToLog("Save downloaded dives that were selected")
 					busy = true
 					rootItem.showBusy()
-					manager.appendTextToLog("Save downloaded dives that were selected")
+					manager.appendTextToLog("temporary disconnecting dive list model")
+					diveList.diveListModel = null
+					manager.appendTextToLog("Record dives")
 					importModel.recordDives()
 					manager.saveChangesLocal()
+					manager.appendTextToLog("resetting model and refreshing the dive list")
 					diveModel.resetInternalData()
 					manager.refreshDiveList()
+					manager.appendTextToLog("pageStack popping Download page")
 					pageStack.pop()
-					pageStack.push(diveList)
+					manager.appendTextToLog("setting up the dive list model again")
+					diveList.diveListModel = diveModel
+					manager.appendTextToLog("pageStack switching to dive list")
+					showDiveList()
 					download.text = qsTr("Download")
 					busy = false
 					rootItem.hideBusy()
 					divesDownloaded = false
+					manager.appendTextToLog("switch to dive list has completed")
 				}
 			}
 			Controls.Label {

mobile-widgets/qml/main.qml

@@ -103,7 +103,16 @@ Kirigami.ApplicationWindow {
 			pageStack.push(mapPage)
 		else
 			pageStack.currentIndex = i
+	}
 
+	function showDiveList() {
+		if (globalDrawer.drawerOpen)
+			globalDrawer.close()
+		var i=pageIndex(diveList)
+		if (i === -1)
+			pageStack.push(diveList)
+		else
+			pageStack.currentIndex = i
 	}
 
 	function pageIndex(pageToFind) {