cleanup, fix some things, try to disable scrollbars on mobile

src/App.scss

@@ -116,7 +116,7 @@ nav {
 
 #content {
   overscroll-behavior-y: none;
-  overflow-y: auto;
+  overflow-y: scroll;
   overflow-x: hidden;
   position: sticky;
 }
@@ -198,6 +198,9 @@ nav {
       margin-left: -2em;
       padding-left: 2.5em;
 
+      // Only show custom scrollbars on devices which
+      // have a cursor/pointer to operate them
+      @media (pointer: fine) {
         &:not(.-show-scrollbar) {
           scrollbar-width: none;
           margin-right: -2em;
@@ -214,6 +217,7 @@ nav {
         }
       }
     }
+  }
 
   &.-no-sticky-headers {
     .column {

src/App.vue

@@ -41,8 +41,8 @@
         <router-view />
       </div>
       <div id="notifs-column" class="column -scrollable" :class="{ '-show-scrollbar': showScrollbars }"/>
-      <media-modal />
     </div>
+    <media-modal />
     <shout-panel
       v-if="currentUser && shout && !hideShoutbox"
       :floating="true"

src/components/chat/chat.scss

@@ -133,18 +133,9 @@
     .chat-view-heading {
       box-sizing: border-box;
       position: static;
-      z-index: 9999;
       top: 0;
       margin-top: 0;
       border-radius: 0;
-
-      /* This practically overlays the panel heading color over panel background
-       * color. This is needed because we allow transparent panel background and
-       * it doesn't work well in this "disjointed panel header" case
-       */
-      background:
-        linear-gradient(to top, var(--panel), var(--panel)),
-        linear-gradient(to top, var(--bg), var(--bg));
       height: 50px;
     }
 

src/components/media_modal/media_modal.vue

@@ -121,7 +121,7 @@ $modal-view-button-icon-width: 3em;
 $modal-view-button-icon-margin: 0.5em;
 
 .modal-view.media-modal-view {
-  z-index: 1001;
+  z-index: 9000;
   flex-direction: column;
 
   .modal-view-button-arrow,

src/components/modal/modal.vue

@@ -35,7 +35,7 @@ export default {
 
 <style lang="scss">
 .modal-view {
-  z-index: 1000;
+  z-index: 2000;
   position: fixed;
   top: 0;
   left: 0;