Fix dropdown menu on profiles not being accessible on narrow screens in web UI (#20620)

app/javascript/mastodon/features/account/components/header.js

@@ -314,8 +314,6 @@ class Header extends ImmutablePureComponent {
               <Avatar account={suspended || hidden ? undefined : account} size={90} />
             </a>
 
-            <div className='spacer' />
-
             {!suspended && (
               <div className='account__header__tabs__buttons'>
                 {!hidden && (

app/javascript/styles/mastodon/components.scss

@@ -7026,8 +7026,11 @@ noscript {
   &__tabs {
     display: flex;
     align-items: flex-start;
+    justify-content: space-between;
     margin-top: -55px;
     padding-top: 10px;
+    gap: 8px;
+    overflow: hidden;
 
     &__buttons {
       display: flex;
@@ -7036,6 +7039,15 @@ noscript {
       padding-top: 55px;
       overflow: hidden;
 
+      .button {
+        flex-shrink: 1;
+        white-space: nowrap;
+
+        @media screen and (max-width: $no-gap-breakpoint) {
+          min-width: 0;
+        }
+      }
+
       .icon-button {
         border: 1px solid lighten($ui-base-color, 12%);
         border-radius: 4px;