Show *correct* system title when upgrading

may not be the same as primary app title

tailbone/templates/upgrades/view.mako

@@ -66,7 +66,7 @@
               <div class="level-item has-text-centered"
                    style="display: flex; flex-direction: column;">
                 <p class="block">
-                  Upgrading ${app_title} (please wait) ...
+                  Upgrading ${system_title} (please wait) ...
                   {{ executeUpgradeComplete ? "DONE!" : "" }}
                 </p>
                 <b-progress size="is-large"
@@ -202,7 +202,7 @@
 
             ThisPage.methods.showExecuteDialog = function() {
                 this.upgradeExecuting = true
-                document.title = "Upgrading ${app_title} ..."
+                document.title = "Upgrading ${system_title} ..."
                 this.$nextTick(() => {
                     this.adjustTextoutHeight()
                 })

tailbone/views/upgrades.py

@@ -149,8 +149,15 @@ class UpgradeView(MasterView):
             return 'notice'
 
     def template_kwargs_view(self, **kwargs):
+        kwargs = super(UpgradeView, self).template_kwargs_view(**kwargs)
         upgrade = kwargs['instance']
 
+        kwargs['system_title'] = self.rattail_config.app_title()
+        if upgrade.system:
+            system = self.upgrade_handler.get_system(upgrade.system)
+            if system:
+                kwargs['system_title'] = system['label']
+
         kwargs['show_prev_next'] = True
         kwargs['prev_url'] = None
         kwargs['next_url'] = None