Fixed a bug where text was not visible in black theme.

Clocker/PanelController.m

@@ -316,10 +316,13 @@ NSString *const CLTimezoneCellViewIdentifier = @"timeZoneCell";
         [cell updateTextColorWithColor:[NSColor whiteColor] andCell:cell];
         [self.mainTableview setBackgroundColor:[NSColor blackColor]];
         self.window.alphaValue = 0.90;
+        [cell.customName setDrawsBackground:YES];
+        [cell.customName setBackgroundColor:[NSColor blackColor]];
     }
     else
     {
         [cell updateTextColorWithColor:[NSColor blackColor] andCell:cell];
+        [cell.customName setDrawsBackground:NO];
         [self.mainTableview setBackgroundColor:[NSColor whiteColor]];
         self.window.alphaValue = 1;
     }

Clocker/Preferences/CLPreferencesViewController.m

@@ -230,8 +230,6 @@ NSString *const CLPreferencesAvailableTimezoneIdentifier = @"availableTimezones"
         self.searchField.stringValue = CLEmptyString;
         [self.timezonePanel close];
         self.activityInProgress = NO;
-  
-
 }
 
 - (void)clearLabel