MPIDE-29: update snippets

Capitalize snippets for consistency, remove redundant portion of
interaction snippet.

src/web/assets/scripts/snippets-modellang.js

@@ -6,23 +6,23 @@ function(require, exports, module) {
 	"use strict";
 
 	exports.snippetText =
-		"snippet system\n" +
+		"snippet SYSTEM\n" +
 			"	SYSTEM: ${1:system_name} = ${2:next_events_expression};\n" +
-		"snippet behavior\n" +
+		"snippet BEHAVIOR\n" +
 			"	BEHAVIOR: ${1:behavior_name} = ${2:next_events_expression};\n" +
-		"snippet interaction\n" +
-			"	INTERACTION: ${1:system_id}:${2:behavior_pattern} ${3:operator} ${4:system_id}:${5:behavior_pattern};\n" +
-		"snippet then\n" +
+		"snippet INTERACTION\n" +
+			"	INTERACTION: ${1:system_id}:${2:behavior_pattern};\n" +
+		"snippet THEN\n" +
 			"	INTERACTION: ${1:system_id}:${2:behavior_pattern} -> ${4:system_id}:${5:behavior_pattern};\n" +
-		"snippet join\n" +
+		"snippet JOIN\n" +
 			"	INTERACTION: ${1:system_id}:${2:behavior_pattern} == ${4:system_id}:${5:behavior_pattern};\n" +
 		"snippet ->\n" +
 			"	-> ${1:system_id}:${2:behavior_pattern}\n" +
 		"snippet ==\n" +
 			"	== ${1:system_id}:${2:behavior_pattern}\n" +
-		"snippet when\n" +
+		"snippet WHEN\n" +
 			"	WHEN: ${1:system_id}:${2:behavior_pattern} { ${3:javascript} };\n" +
-		"snippet init\n" +
+		"snippet INIT\n" +
 			"	INIT: ${1:system_id} { ${3:javascript} };\n"
 		;