Updated styles to use logical properties/values

- Intended to improve RTL support in the interface.
- Also adds hebrew to language dropdown since that was missing.

Related to #1794

resources/lang/en/settings.php

@@ -192,6 +192,7 @@ return [
         'es' => 'Español',
         'es_AR' => 'Español Argentina',
         'fr' => 'Français',
+        'he' => 'עברית',
         'hu' => 'Magyar',
         'it' => 'Italian',
         'ja' => '日本語',