merge two if

system/scripts/hooks.js

@@ -442,8 +442,7 @@ export default class HooksL5r5e {
                 });
 
                 // If gm add a extra button to easily filter the content to see the same stuff as a player
-                if(game.user.isGM) {
-                    if(unavailableSourceForPlayers.length > 0) {
+                if (game.user.isGM && unavailableSourceForPlayers.length > 0) {
                     const buttonHTML = `<button type="button" class="gm" data-tooltip="${game.i18n.localize('l5r5e.multiselect.player_filter_tooltip')}">`
                     + game.i18n.localize('l5r5e.multiselect.player_filter_label')
                     + '</button>'
@@ -451,12 +450,12 @@ export default class HooksL5r5e {
                     const filterPlayerView = game.settings.get(CONFIG.l5r5e.namespace, "all-compendium-references")
                         .filter((item) => !unavailableSourceForPlayers.includes(item))
                         .filter((item) => sources_in_this_compendium.has(item));
+
                     $(buttonHTML).appendTo($(header).find("l5r5e-multi-select")).click(function() {
                         header.find("l5r5e-multi-select")[0].value = filterPlayerView;
                     });
                 }
             }
-            }
 
             // TODO find a better way
             // This is ugly but if we hide the content too early then it won't be hidden for some reason.