fix: unique library list entries filter

Author: janfh

src/connection/manager.ts

@@ -30,7 +30,7 @@ export class SQLJobManager {
       const config = instance.getConfig();
 
       const newJob = predefinedJob || (new OldSQLJob({
-        libraries: uniqueStrings([config.currentLibrary, ...config.libraryList]),
+        libraries: [config.currentLibrary, ...config.libraryList].filter((item, index, arr) => arr.indexOf(item) === index),
         naming: `system`,
         "full open": false,
         "transaction isolation": "none",
@@ -162,9 +162,3 @@ export class SQLJobManager {
     return Configuration.get<SelfValue>(`jobSelfDefault`) || `*NONE`;
   }
 }
-
-const uniqueStrings = (arr: string[]): string[] => {
-  return arr.filter((item,
-      index) => arr.indexOf(item) === index);
-}
-