Add support for custom gyro alignment.

Prior to this, if custom alignment is set in the firmware the
configurator will not show the 'Custom' setting and will reset the
'Custom' setting to 'Default' when saved.

src/js/tabs/configuration.js

@@ -322,6 +322,10 @@ TABS.configuration.initialize = function (callback, scrollPosition) {
             'CW 270° flip'
         ];
 
+        if (semver.gte(CONFIG.apiVersion, "1.42.0")) {
+            alignments.push('Custom');
+        }
+
         var gyro_align_content_e = $('.tab-configuration .gyro_align_content');
         var legacy_gyro_alignment_e = $('.tab-configuration .legacy_gyro_alignment');
         var legacy_accel_alignment_e = $('.tab-configuration .legacy_accel_alignment');