allow to select multi folder to load

closes #74 (closed)

User can use cmd/ctrl + click to select multi folders to load data or detect channels in Channel Preferences Dialog

tests/controller/test_util.py

@@ -19,7 +19,7 @@ from sohstationviewer.controller.util import (
     get_val,
     rtn_pattern,
     add_thousand_separator,
-    get_total_files
+    get_valid_file_count
 )
 
 TEST_DATA_DIR = os.path.realpath(os.path.join(
@@ -371,8 +371,8 @@ class TestFmti(TestCase):
 
 
 class TestGetTotalFiles(TestCase):
-    def test_get_total_files(self):
+    def test_get_valid_file_count(self):
         list_of_dir = [os.path.join(TEST_DATA_DIR, 'Centaur-sample'),
                        os.path.join(TEST_DATA_DIR, 'Q330-sample')]
-        total_files = get_total_files(list_of_dir)
+        total_files = get_valid_file_count(list_of_dir)
         self.assertEqual(total_files, 6)