Minor UI changes (#3078)

Updating navbar dropdown

Updating margin on login page

webapp/sass/responsive/_mobile.scss

@@ -147,10 +147,6 @@
 
         &.same--root {
             &.same--user {
-                .post__time {
-                    display: none;
-                }
-
                 .post__header {
                     height: auto;
                     margin-top: 5px;
@@ -286,7 +282,7 @@
     .signup-team__container {
         font-size: .9em;
         margin-bottom: 30px;
-        padding: 30px 0;
+        padding: 60px 10px 0;
 
         .signup-team__name {
             font-size: 2em;
@@ -1021,9 +1017,8 @@
 
 @media screen and (max-height: 640px) {
     .signup-team__container {
-        padding: 30px 0;
-        margin-bottom: 30px;
         font-size: .9em;
+        margin-bottom: 30px;
 
         .signup-team__name {
             font-size: 2em;