Selecting and unselecting items

[jainkuniya]

There are some minor issues regarding selecting and unselecting items:-

• On long pressing on items of Flash Template item is selected but item background color is not changed. Which will confuse user which item is selected.
  

• When items are selected and back button is pressed it finishes activity. On back button it should unselect the items.

• As of now if we want to unselect an item we have to long press on it. I think it would we better to unselect on single click like in whatsapp.

[taeven]

can i work on that??

[jainkuniya]

@taeven thanks for your interest. I am waiting for @opticod review before making PR.

[taeven]

okay!

[opticod]

@vishwesh3, Your idea looks fine. You can proceed.

[opticod]

Closed via #423