genlist: select the focused item on enter key input

genlist: select the focused item on enter key input

there was no way to select an item with key input on ELM_ITEM_SELECT_ON_FOCUS_DISABLE mode.
this patch enables select and multi select with enter/space key input.

@fix

Conflicts:

	src/lib/elm_genlist.c

Change-Id: Ie162170b67e7e03fad2c3f4572f97ffe40bff563