Added UI element for removeDuplicates and compact.

views/ctrlpainter_bank.html

 <div class="painter-bank-controls hidden">
+  <button class="pure-button" emit="bank_remove_duplicates"><i class="fa fa-eraser"></i></button>
   <label for="mode-select">
     Bank Size:
     <select id="mode-select" class="painter-bank-mode">