[WebHost] Add search filter and collapse button to Supported Games page (#2215)

* Add search filter and collapse button to Supported Games page

* Autofocus search input, fix bug with arrow display when searching

* Add "Expand All" and "Collapse All" buttons. Buttons respect visible games.

WebHostLib/static/styles/supportedGames.css

@@ -18,6 +18,16 @@
     margin-bottom: 2px;
 }
 
+#games h2 .collapse-arrow{
+    font-size: 20px;
+    vertical-align: middle;
+    cursor: pointer;
+}
+
+#games p.collapsed{
+    display: none;
+}
+
 #games a{
     font-size: 16px;
 }
@@ -31,3 +41,13 @@
     line-height: 25px;
     margin-bottom: 7px;
 }
+
+#games #page-controls{
+    display: flex;
+    flex-direction: row;
+    margin-top: 0.25rem;
+}
+
+#games #page-controls button{
+    margin-left: 0.5rem;
+}