Explicitly set heap size on vscode cf editor language server.

vscode-extensions/commons-vscode/src/launch-util.ts

@@ -25,11 +25,12 @@ export interface ActivatorOptions {
     extensionId: string;
     clientOptions: LanguageClientOptions;
     fatJarFile: string;
+    jvmHeap?: string;
 }
 
-
 export function activate(options: ActivatorOptions, context: VSCode.ExtensionContext) {
     let DEBUG = options.DEBUG;
+    let jvmHeap = options.jvmHeap;
     if (options.CONNECT_TO_LS) {
         connectToLS(context, options);
     } else {
@@ -87,6 +88,9 @@ export function activate(options: ActivatorOptions, context: VSCode.ExtensionCon
                                 '-jar',
                                 fatJarFile,
                             ];
+                            if (jvmHeap) {
+                                args.unshift("-Xmx"+jvmHeap);
+                            }
                             if (DEBUG) {
                                 args.unshift(DEBUG_ARG);
                             }

vscode-extensions/vscode-manifest-yaml/lib/Main.ts

@@ -32,6 +32,7 @@ export function activate(context: VSCode.ExtensionContext) {
         CONNECT_TO_LS: false,
         extensionId: 'vscode-manifest-yaml',
         fatJarFile: 'target/vscode-manifest-yaml-0.0.2-SNAPSHOT.jar',
+        jvmHeap: '48m',
         clientOptions: {
             // HACK!!! documentSelector only takes string|string[] where string is language id, but DocumentFilter object is passed instead
             // Reasons: