[Web] Minify css and js via PHP

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

data/web/css/build/008-mailcow.css

@@ -1,26 +1,14 @@
-@font-face {
-  font-family: 'Source Sans Pro';
-  font-style: normal;
-  font-weight: 300;
-  src: local('Source Sans Pro Light'), local('SourceSansPro-Light'), url('../fonts/SourceSansPro-Light.woff2') format('woff2');
+@font-face {font-family: 'PT Sans'; 
+  src: local('PT Sans'), url('/fonts/PTS55F_W.woff') format('woff');
 }
-@font-face {
-  font-family: 'Source Sans Pro';
-  font-style: normal;
-  font-weight: 400;
-  src: local('Source Sans Pro'), local('SourceSansPro-Regular'), url('../fonts/SourceSansPro-Regular.woff2') format('woff2');
-}
-@font-face {
-  font-family: 'Source Sans Pro';
-  font-style: normal;
-  font-weight: 700;
-  src: local('Source Sans Pro Bold'), local('SourceSansPro-Bold'), url('../fonts/SourceSansPro-Bold.woff2') format('woff2');
-}
-@font-face {
-  font-family: 'Source Sans Pro';
+@font-face {font-family: 'PT Sans'; 
   font-style: italic;
-  font-weight: 300;
-  src: local('Source Sans Pro Italic'), local('SourceSansPro-Italic'), url('../fonts/SourceSansPro-Italic.woff2') format('woff2');
+  src: local('PT Sans Italic'), url('/fonts/PTS56F_W.woff') format('woff');
+}
+@font-face {font-family: 'PT Sans';
+  font-style: normal;
+  font-weight: bold; 
+  src: local('PT Sans Bold'), url('/fonts/PTS75F_W.woff') format('woff');
 }
 #maxmsgsize { min-width: 80px; }
 #slider1 .slider-selection {
@@ -91,6 +79,7 @@ body.modal-open {
   padding-right: inherit !important;
 }
 body {
+  font-family: "PT Sans","Helvetica Neue",Helvetica,Arial,sans-serif;
   font-size:11pt;
 }
 #mailcow-alert {