Fix chat.jsx lints (#3889)

app/assets/stylesheets/chat.scss

@@ -441,17 +441,21 @@
     );
   }
 
-  img {
+  .activechatchannel__channelconfig {
     height: 17px;
     position: absolute;
     right: 15px;
     top: 10px;
     cursor: pointer;
     @include themeable(
-      filter, 
-      theme-social-icon-invert, 
-      invert(0)
-    );  
+        filter,
+        theme-social-icon-invert,
+        invert(0)
+    );
+
+    img {
+      height: 100%;
+    }
   }
 }
 

app/javascript/chat/__tests__/__snapshots__/chat.test.jsx.snap

@@ -11,6 +11,7 @@ exports[`<Chat /> should load chat 1`] = `
     <button
       class="chat__channelstogglebutt"
       onClick={[Function]}
+      type="button"
     >
       &lt;
     </button>
@@ -25,6 +26,7 @@ exports[`<Chat /> should load chat 1`] = `
         class="chat__channeltypefilterbutton chat__channeltypefilterbutton--active"
         data-channel-type="all"
         onClick={[Function]}
+        type="button"
       >
         all
       </button>
@@ -32,6 +34,7 @@ exports[`<Chat /> should load chat 1`] = `
         class="chat__channeltypefilterbutton chat__channeltypefilterbutton--inactive"
         data-channel-type="direct"
         onClick={[Function]}
+        type="button"
       >
         direct
       </button>
@@ -39,6 +42,7 @@ exports[`<Chat /> should load chat 1`] = `
         class="chat__channeltypefilterbutton chat__channeltypefilterbutton--inactive"
         data-channel-type="invite_only"
         onClick={[Function]}
+        type="button"
       >
         group
       </button>