mainview: preload the conversation view

This prevents a bug when loading into the call view before having loaded the conversation view at least once, can prevent the call action bar from displaying.


Gitlab: #1002
Change-Id: I1c9e3debc0341630b3ca104bfbdfa71339918e6b

src/app/MainApplicationWindow.qml

@@ -161,6 +161,7 @@ ApplicationWindow {
                 // Present the welcome view once the viewCoordinator is setup.
                 viewCoordinator.initialized.connect(function() {
                     viewCoordinator.present("WelcomePage")
+                    viewCoordinator.preload("ConversationView")
                 })
                 // Set the viewCoordinator's root item.
                 viewCoordinator.setRootView(item)

src/app/ViewCoordinator.qml

@@ -173,6 +173,13 @@ QtObject {
         return -1
     }
 
+    // Load a view without presenting it.
+    function preload(viewName) {
+        if (!viewManager.createView(resources[viewName], null)) {
+            console.log("Failed to load view: " + viewName)
+        }
+    }
+
     // This function presents the view with the given viewName in the
     // specified StackView. Return the view if successful.
     function present(viewName, sv=activeStackView) {
@@ -292,6 +299,8 @@ QtObject {
 
     // Dismiss by view name.
     function dismiss(viewName) {
+        if (!rootView) return
+
         const depth = activeStackView.depth
         for (var i = (depth - 1); i >= 0; i--) {
             const view = activeStackView.get(i, StackView.DontLoad)