added flex-direction column to .login-page & .register-page

build/scss/pages/_login_and_register.scss

@@ -19,6 +19,7 @@
   align-items: center;
   background: $gray-200;
   display: flex;
+  flex-direction: column;
   height: 100vh;
   justify-content: center;
 }

dist/css/adminlte.css

@@ -19954,6 +19954,8 @@ html.maximized-card {
   background: #e9ecef;
   display: -ms-flexbox;
   display: flex;
+  -ms-flex-direction: column;
+  flex-direction: column;
   height: 100vh;
   -ms-flex-pack: center;
   justify-content: center;