Always show file tokens in JS completion lists

Fixes microsoft#6654

Author: RyanCavanaugh

src/services/services.ts

@@ -3834,7 +3834,7 @@ namespace ts {
 
             const entries: CompletionEntry[] = [];
 
-            if (isRightOfDot && isSourceFileJavaScript(sourceFile)) {
+            if (isSourceFileJavaScript(sourceFile)) {
                 const uniqueNames = getCompletionEntriesFromSymbols(symbols, entries);
                 addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
             }

tests/cases/fourslash/getJavaScriptGlobalCompletions1.ts

@@ -0,0 +1,15 @@
+/// <reference path="fourslash.ts" />
+
+// @allowNonTsExtensions: true
+// @Filename: Foo.js
+//// function f() {
+////     // helloWorld leaks from here into the global space?
+////     if (helloWorld) {
+////         return 3;
+////     }
+////     return 5;
+//// }
+//// 
+//// hello/**/
+
+verify.completionListContains('helloWorld');