Update ACE Editor to version 1.2.9

The new ACE editor introduces full support for emojis (and, thereby, UTF-16 characters with high- and low-surrogates). Hence, we can remove our custom fix.

Further, this update will allow emojis to be used in pair programming sessions.

vendor/assets/javascripts/ace/snippets/actionscript.js

@@ -34,9 +34,13 @@ snippet all\n\
 		${1:public|internal|final} class ${2:name} ${3:extends } {\n\
 			private|public| static const FOO = \"abc\";\n\
 			private|public| static var BAR = \"abc\";\n\
+\n\
+			// class initializer - no JIT !! one time setup\n\
 			if Cababilities.os == \"Linux|MacOS\" {\n\
 				FOO = \"other\";\n\
 			}\n\
+\n\
+			// constructor:\n\
 			public function $2 (	){\n\
 				super2();\n\
 				trace(\"start\");\n\
@@ -49,6 +53,7 @@ snippet all\n\
 	}\n\
 \n\
 	function A(){\n\
+		// A can only be accessed within this file\n\
 	}\n\
 snippet switch\n\
 	switch(${1}){\n\