Rename stop/restart app buttons

Author: LEDfan

src/main/resources/fragments/navbar.html

@@ -38,10 +38,10 @@
 					   data-toggle="modal" data-target="#switchInstancesModal" th:if="${isAppPage && (maxInstances > 1 || maxInstances == -1)}" >Switch instance</a>
 
 					<a role="button" class="btn btn-primary btn-sm" onclick="Shiny.instances.eventHandlers.onRestartInstance();"
-						th:if="${isAppPage && maxInstances == 1}" >Restart instance</a>
+						th:if="${isAppPage && maxInstances == 1}" >Restart app</a>
 
 					<a role="button" class="btn btn-primary btn-sm" onclick="Shiny.instances.eventHandlers.onDeleteInstance();"
-					   th:if="${isAppPage && maxInstances == 1}" >Stop instance</a>
+					   th:if="${isAppPage && maxInstances == 1}" >Stop app</a>
 
 					<a role="button" class="btn btn-primary btn-sm" th:if="${isSupportEnabled}"
 						data-toggle="modal" data-target="#reportIssueModal">Report Issue</a>