Revert django-bootstrap4 update and related js dependencies to fix availability issues

This fixes #122 (closed)

AKPlanning/settings.py

@@ -166,13 +166,16 @@ BOOTSTRAP4 = {
         "href": STATIC_URL + "common/css/bootstrap.css",
     },
     "javascript_url": {
-        "url": STATIC_URL + "common/vendor/bootstrap/bootstrap-4.6.0.min.js",
+        "url": STATIC_URL + "common/vendor/bootstrap/bootstrap-4.3.1.min.js",
     },
     "jquery_url": {
-        "url": STATIC_URL + "common/vendor/jquery/jquery-3.5.1.min.js",
+        "url": STATIC_URL + "common/vendor/jquery/jquery-3.3.1.min.js",
     },
     "jquery_slim_url": {
-        "url": STATIC_URL + "common/vendor/jquery/jquery-3.5.1.slim.min.js",
+        "url": STATIC_URL + "common/vendor/jquery/jquery-3.3.1.slim.min.js",
+    },
+    "popper_url": {
+        "url": STATIC_URL + "common/vendor/popper/popper-1.14.7.min.js",
     },
 }