Use locale_get_display_name for language labels

locale_get_display_language reads only the language subtag and ignores
the region, so zh-cn and zh-tw both rendered as 'Chinese - 中文'.
Switching to locale_get_display_name disambiguates region variants
(Chinese (China) / Chinese (Taiwan)) while leaving all region-less
locales unchanged.

Updated the settings language dropdown and the /i/lang picker.

resources/views/settings/home.blade.php

@@ -70,7 +70,7 @@
 			<div class="col-sm-9">
 				<select class="form-control" name="language">
 				@foreach(App\Util\Localization\Localization::languages() as $lang)
-					<option value="{{$lang}}" {{(Auth::user()->language ?? 'en') == $lang ? 'selected':''}}>{{locale_get_display_language($lang, 'en')}} - {{locale_get_display_language($lang, $lang)}}</option>
+					<option value="{{$lang}}" {{(Auth::user()->language ?? 'en') == $lang ? 'selected':''}}>{{locale_get_display_name($lang, 'en')}} - {{locale_get_display_name($lang, $lang)}}</option>
 				@endforeach
 				</select>
 			</div>

resources/views/site/language.blade.php

@@ -10,8 +10,8 @@
         @foreach(App\Util\Localization\Localization::languages() as $lang)
         <div class="col-12 col-md-4 mb-2">
           <a href="/i/lang/{{$lang}}" class="{{$current == $lang ? 'font-weight-bold text-primary' : 'text-muted'}} pr-3 b-3">
-            {{locale_get_display_language($lang, $lang)}} 
-            <span class="small text-lighter">({{locale_get_display_language($lang, 'en')}})</span>
+            {{locale_get_display_name($lang, $lang)}} 
+            <span class="small text-lighter">({{locale_get_display_name($lang, 'en')}})</span>
           </a>
         </div>
         @endforeach