Prompt for sketchbook folder only if in GUI mode

Author: cmaglie

app/src/processing/app/Base.java

@@ -1807,10 +1807,9 @@ public List<JMenu> getBoardsCustomMenus() {
   }
 
   public File getDefaultSketchbookFolderOrPromptForIt() {
-
     File sketchbookFolder = BaseNoGui.getDefaultSketchbookFolder();
 
-    if (sketchbookFolder == null) {
+    if (sketchbookFolder == null && !isCommandLine()) {
       sketchbookFolder = promptSketchbookLocation();
     }