Notify client that folder sync is done, so the message is not there

for the entire session. Also added a elvis in cases where folder.name
is null to avoid confusing notification messages.

Author: themkat

server/src/main/kotlin/org/javacs/kt/KotlinLanguageServer.kt

@@ -108,7 +108,7 @@ class KotlinLanguageServer : LanguageServer, LanguageClientAware, Closeable {
 
         folders.forEachIndexed { i, folder ->
             LOG.info("Adding workspace folder {}", folder.name)
-            val progressPrefix = "[${i + 1}/${folders.size}] ${folder.name}"
+            val progressPrefix = "[${i + 1}/${folders.size}] ${folder.name ?: ""}"
             val progressPercent = (100 * i) / folders.size
 
             progress?.update("$progressPrefix: Updating source path", progressPercent)
@@ -122,6 +122,7 @@ class KotlinLanguageServer : LanguageServer, LanguageClientAware, Closeable {
                 sourcePath.refresh()
             }
         }
+		progress?.close()
 
         textDocuments.lintAll()