Apply button height tweak to game list in Arcade settings screen to fix inconsistent button height.

bemani/frontend/static/controllers/arcade/arcade.react.js

@@ -345,7 +345,7 @@ var arcade_management = React.createClass({
                         emptymessage="There are no PCBIDs assigned to this arcade."
                     />
                 </div>
-                <div className="section">
+                <div className="section settings-nav">
                     <h3>Game Settings For This Arcade</h3>
                     { this.state.settings.map(function(game_settings) {
                         var current = makeSettingName(game_settings);

bemani/frontend/static/form.css

@@ -115,6 +115,6 @@ button.delete {
     background: #ffe4e4;
 }
 
-.popn-nav button {
+.popn-nav button, .settings-nav button {
     height: 32px;
 }