Use set instead of array to keep list of supported plugins per client

Summary: Use set instead of array to keep list of supported plugins per client. It is not used as array anyway, in most places it is used to determine whether a plugin is supported or not and it's much faster to use set for that.

Reviewed By: priteshrnandgaonkar

Differential Revision: D29200673

fbshipit-source-id: 5f3c404a1a668c153867d7c1b6c223941f0b3b36

desktop/app/src/PluginContainer.tsx

@@ -417,10 +417,7 @@ class PluginContainer extends PureComponent<Props, State> {
         selectPlugin: (pluginID: string, deepLinkPayload: unknown) => {
           const {target} = this.props;
           // check if plugin will be available
-          if (
-            target instanceof Client &&
-            target.plugins.some((p) => p === pluginID)
-          ) {
+          if (target instanceof Client && target.plugins.has(pluginID)) {
             this.props.selectPlugin({
               selectedPlugin: pluginID,
               deepLinkPayload,