Reverted primefaces#3056

Author: mertsincan

src/main/java/org/primefaces/mobile/renderkit/HeadRenderer.java

@@ -62,7 +62,7 @@ public void encodeBegin(FacesContext context, UIComponent component) throws IOEx
         renderCSS(context, "mobile/primefaces-mobile.css", "primefaces");
 
         if (cc.isFontAwesomeEnabled()) {
-            renderCSS(context, "fa/fontawesome-all.css", "primefaces");
+            renderCSS(context, "fa/font-awesome.css", "primefaces");
         }
 
         renderJS(context, "jquery/jquery.js", "primefaces");

src/main/java/org/primefaces/renderkit/HeadRenderer.java

@@ -82,7 +82,7 @@ public void encodeBegin(FacesContext context, UIComponent component) throws IOEx
         }
 
         if (cc.isFontAwesomeEnabled()) {
-            encodeCSS(context, "primefaces", "fa/fontawesome-all.css");
+            encodeCSS(context, "primefaces", "fa/font-awesome.css");
         }
 
         //Middle facet

src/main/resources/META-INF/resources/primefaces/core/core.css

@@ -97,14 +97,8 @@ ui-overlay-visible * {
 }
 
 /* FontAwesome */
-.ui-widget .ui-icon.fa,
-.ui-icon.fa,
-.ui-widget .ui-icon.fab,
-.ui-icon.fab,
-.ui-widget .ui-icon.far,
-.ui-icon.far,
-.ui-widget .ui-icon.fas,
-.ui-icon.fas {
+.ui-widget .ui-icon.fa, 
+.ui-icon.fa {
     background: none repeat scroll 0 0 transparent !important;
     text-indent: 0px !important;
 }