* Rename `LAST_PROPERTY` to `PROP_LAST`.
* Use GObject macros for declaration.
* Use GObject macros for definition.
* Move all internal property handling together.
* Move class init/finalize together with the rest of GObject implementation.
* Move callbacks together.
* Move helpers together (or inline).
* Add `g_return_if_fail(PIDGIN_IS_MINI_DIALOG(...))` on public API.
Testing Done:
Compile and connect an account with some buddy requests.
Reviewed at https://reviews.imfreedom.org/r/787/
# UPDATING VERSION NUMBERS FOR RELEASES
#
# The version number is:
# <major>.<minor>.<micro><extra>
#
# micro += 1
#
# If any functions have been added to libpurple, Pidgin, or Finch:
# micro = 0
# minor += 1
#
# If backwards compatibility has been broken in libpurple, Pidgin, or Finch:
# micro = 0
# minor = 0
# major += 1
# purple_soversion += 1
#
# extra should be similar to one of the following: