In the upper right-hand corner, the green "save" check mark is very close to the "undo" symbol. My fat thumb is always hitting the "undo" when I intended to hit "save". Then I have to re-do the action I just undid. So, things take longer. Please move these two symbols away from each other.
Swiping right closes the search window. Because of the way my hand works, sometimes I do this on accident, close the search. The problem is when I go back to the search, I have to start from scratch. The last search is not saved. This is annoying when I have a complex search string because it has to be re-entered. It would be nice to save the last search in the search window, and require the user to take a positive action to clear it, instead of just starting from scratch.