fix/Increase z-index of popover to 3

Author: LewisYoul

app/assets/stylesheets/_header.scss

@@ -12,7 +12,7 @@
   position: -webkit-sticky; /* Safari */
   position: fixed;
   top: 0;
-  z-index: 2;
+  z-index: 3;
   margin-bottom: $topbar-margin;
 }
 

app/controllers/snippets_controller.rb

@@ -175,8 +175,6 @@ def destroy
     @snippet = current_user.snippets.find(params[:id])
 
     if @snippet&.destroy
-      flash[:notice] = 'Snippet deleted!'
-      
       render json: { resource_id: @snippet.client_id }
     else
       head :bad_request

app/views/shared/_popover_trigger.html.erb

@@ -3,7 +3,7 @@
     data-controller="popover"
     data-action="click->popover#display click@window->popover#hide"
     data-popover-url="<%= popover_path %>"
-    class="z-1 flex position-<%= defined?(position) ? position : 'relative' %>"
+    class="z-3 flex position-<%= defined?(position) ? position : 'relative' %>"
   >
     <% if defined?(content) %>
       <%= yield content %>