Updated bootstrap dropdown mark up

Author: frogprincess

db/subplugins.json

@@ -1,4 +1,7 @@
 {
+  "subplugintypes": {
+    "peerworkcalculator": "calculator"
+  },
   "plugintypes": {
     "peerworkcalculator": "mod\/peerwork\/calculator"
   }

templates/peerwork_detail_summary.mustache

@@ -85,8 +85,7 @@
 {{# overridepeergrades }}
     <strong>{{# str }} overridepeergradesby, mod_peerwork {{/ str }}</strong>
     <div id="memberdropdown" class="dropdown justify-content-center py-3">
-        <a class="dropdown-toggle nav-link" id="drop-down-{{ uniqid }}" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" title="{{# str }} select, core {{/ str }}"
-           href="#">
+        <a class="btn btn-secondary dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false" title="{{# str }} select, core {{/ str }}">
             {{# str }} select, core {{/ str }}
         </a>
         <div class="dropdown-menu mt-0" aria-labelledby="drop-down-{{ uniqid }}">