Minor bug fixes and updates:

* Removed progress bar sample that progresses in reverse direction - This needs a class of its own
* Fixed a casting error in progress_bar class when dealing with max_progress variable
* Minor update to the cursor movement functions in linux
* Updated single include to include these changes

samples/progress_bar_set_progress.cpp

@@ -45,8 +45,6 @@ int main() {
 
   bar.set_progress(100); // all done
 
-  bar.mark_as_completed();
-
   // Show cursor
   indicators::show_console_cursor(true);