[Web] Minify css and js via PHP

[Web] Use PT Sans
[Web] Update some libs

data/web/inc/lib/composer.json

@@ -5,6 +5,7 @@
         "phpmailer/phpmailer": "^5.2",
         "php-mime-mail-parser/php-mime-mail-parser": "^2.9",
         "soundasleep/html2text": "^0.5.0",
-        "ddeboer/imap": "^1.5"
+        "ddeboer/imap": "^1.5",
+        "matthiasmullie/minify": "^1.3"
     }
 }