Simplify SyncPlay settings screen and remove unused translations

src/strings/en-us.json

@@ -453,10 +453,7 @@
     "HeaderSyncPlayEnabled": "SyncPlay enabled",
     "HeaderSyncPlaySelectGroup": "Join a group",
     "HeaderSyncPlaySettings": "SyncPlay Settings",
-    "HeaderSyncPlayGroupSettings": "Group",
-    "HeaderSyncPlayAdvancedSettings": "Advanced",
     "HeaderSyncPlayPlaybackSettings": "Playback",
-    "HeaderSyncPlayLocalSettings": "Local",
     "HeaderSyncPlayTimeSyncSettings": "Time sync",
     "HeaderSystemDlnaProfiles": "System Profiles",
     "HeaderTaskTriggers": "Task Triggers",
@@ -873,8 +870,6 @@
     "LabelSyncPlayTimeSyncDevice": "Time syncing with:",
     "LabelSyncPlayTimeSyncOffset": "Time offset:",
     "LabelSyncPlaySettingsDescription": "Change SyncPlay preferences",
-    "LabelSyncPlaySettingsGroupName": "Group name:",
-    "LabelSyncPlaySettingsGroupNameHelp": "Change the group's name.",
     "LabelSyncPlaySettingsExtraTimeOffset": "Extra time offset:",
     "LabelSyncPlaySettingsExtraTimeOffsetHelp": "Manually adjust time offset with selected device for time sync. Tweak with care.",
     "LabelSyncPlaySettingsSyncCorrection": "Sync Correction",
@@ -891,7 +886,6 @@
     "LabelSyncPlaySettingsSpeedToSyncHelp": "Sync correction method that consist in speeding up the playback. Sync Correction must be enabled.",
     "LabelSyncPlaySettingsSkipToSync": "Enable SkipToSync",
     "LabelSyncPlaySettingsSkipToSyncHelp": "Sync correction method that consist in seeking to the estimated position. Sync Correction must be enabled.",
-    "LabelSyncPlaySettingsCreateGroup": "Create group",
     "LabelTag": "Tag:",
     "LabelTagline": "Tagline:",
     "LabelTextBackgroundColor": "Text background color:",