More square shaped corners on blocks (toggle rect and arrow corner)

theme/blockly.less

@@ -74,6 +74,15 @@ span.blocklyTreeLabel {
     border-radius: 0px !important;
 }
 
+.blocklyDropDownArrow.arrowTop {
+    border-top-left-radius: 0px !important;
+}
+
+.blocklyToggleRect {
+    rx: 0 !important;
+    ry: 0 !important;
+}
+
 /* Mobile */
 @media only screen and (max-width: @largestMobileScreen) {
     #blocklyTrashIcon {