[chores] Added CSS for djang-allauth forms submit button

Author: pandafy

openwisp_utils/admin_theme/static/admin/css/openwisp.css

@@ -520,6 +520,7 @@ input[type="submit"].default,
 .object-tools a:link,
 .object-tools a:visited,
 .button,
+button[type="submit"],
 input[type="submit"],
 input[type="button"],
 .submit-row input,
@@ -608,6 +609,9 @@ input[type="submit"].default:focus,
 .object-tools button:hover,
 .object-tools button:focus,
 .button:active,
+button[type="submit"]:active,
+button[type="submit"]:hover,
+button[type="submit"]:focus,
 input[type="submit"]:active,
 input[type="button"]:active,
 .button:focus,