Refactor roughCount into an atomic QGadget, fix usage of i18np
i18np's first argument should be a valid number. Meanwhile roughCount was a string. Instead we should pass the original number as the plural-deciding argument, while using the formatted string only for the actual substitution.
It is only natural to factor out the counter into a gadget class of its
own, since all of its properties (and their semantics like the
roughCount.length > 0 special case) change atomically and thus do not
require separate connections.
Also, let's store the Timer inline, instead of allocating dynamically.
(cherry picked from commit 576e460a)
(and adapted to Qt 5)
Edited by ivan tkachenko