plugins(): dashboards, changed wording installed to imported when showing imported version in dashboard list

public/app/features/plugins/import_list/import_list.html

@@ -17,7 +17,7 @@
 					v{{dash.revision}}
 				</td>
 				<td ng-if="dash.installed">
-					Installed v{{dash.installedRevision}}
+					Imported v{{dash.installedRevision}}
 				</td>
 				<td style="text-align: right">
 					<button class="btn btn-secondary" ng-click="ctrl.import(dash, false)" ng-show="!dash.installed">