Brush marks

NEW Folders — file the chapters of one subject into a single folder so your library stops being one long flat list NEW Drill a whole folder at once — chapters imported separately can now be practiced as one set, in order, shuffled, or mistakes only NEW Merge the banks inside a folder into one bank when the split was a mistake; answer history, accuracy and mistake flags all carry over NEW Swipe left / right while answering to move between questions, following your finger NEW Swipe through questions in the editor to proofread a fresh import — edits save as you move on IMPROVED Bank, folder and mistake-book sessions each remember their own "continue where you left off"