Fix/Implement update in toolbox

plugins/Toolbox/resources/qml/ToolboxInstalledTile.qml

@@ -102,4 +102,4 @@ Item
             onMetadataChanged: canUpdate = toolbox.canUpdate(model.id)
         }
     }
-}
+}

plugins/Toolbox/resources/qml/ToolboxInstalledTileActions.qml

@@ -37,7 +37,10 @@ Column
                     font: UM.Theme.getFont("default_bold")
                 }
             }
-            onClicked: toolbox.update(model.id)
+            onClicked: {
+                // Must do all stuff in 1 function as the current ToolboxInstalledTile object is going to disappear...
+                toolbox.update(model.id)
+            }
         }
         ProgressBar
         {
@@ -90,4 +93,4 @@ Column
         }
         onClicked: toolbox.uninstall(model.id)
     }
-}
+}