GUACAMOLE-723: Size panel thumbnails vertically, not horizontally.

guacamole/src/main/webapp/app/client/styles/other-connections.css

@@ -95,11 +95,16 @@
     opacity: 0.5;
     transition: opacity 0.25s;
 
-    width: 192px;
+    max-height: 128px;
-    max-width: 30vw;
+    vertical-align: middle;
 
 }
 
+#other-connections .client-panel-connection .thumbnail-main img {
+    max-width: none;
+    max-height: 128px;
+}
+
 #other-connections .client-panel-connection a[href]::before {
 
     display: block;