Retry initial sync on generic network errors (#422)

src/ChatPage.cpp

@@ -1169,6 +1169,12 @@ ChatPage::initialSyncHandler(const mtx::responses::Sync &res, mtx::http::Request
 
                 nhlog::net()->error("initial sync error: {} {}", status_code, err_code);
 
+                // non http related errors
+                if (status_code <= 0 || status_code >= 600) {
+                        startInitialSync();
+                        return;
+                }
+
                 switch (status_code) {
                 case 502:
                 case 504:

src/MainWindow.h

@@ -105,6 +105,9 @@ private slots:
         //! Show the login page in the main window.
         void showLoginPage()
         {
+                if (modal_)
+                        modal_->hide();
+
                 pageStack_->addWidget(login_page_);
                 pageStack_->setCurrentWidget(login_page_);
         }