[Translate] More work yay~

This moves checkboxes on the local chat floater into a centralized flyout
Adds persistent setting for whether or not to show muted text in local chat.

Translators: Please translate the new flyout button and the strings in floater_chat_history.xml

indra/newview/app_settings/settings_ascent.xml

@@ -785,6 +785,17 @@
 			<key>Value</key>
 			<boolean>1</boolean>
 		</map>
+		<key>SinguShowMutedLocal</key>
+		<map>
+			<key>Comment</key>
+			<string>Show muted chat in local chat</string>
+			<key>Persist</key>
+			<integer>1</integer>
+			<key>Type</key>
+			<string>Boolean</string>
+			<key>Value</key>
+			<boolean>0</boolean>
+		</map>
 		<key>UseWebProfiles</key>
 		<map>
 			<key>Comment</key>