pidgin/pidgin

Move minidialog stuff from utils to its source file

2021-07-22, Elliott Sales de Andrade
d92defc9ba95
Move minidialog stuff from utils to its source file

* Remove minidialog list from utils.
It's supposed to be used to delete them when the connection is dropped, but this list is never added to. And the dialogs are automatically closed when the account disconnects in some other way that I could not find.
Consequently, drop the unused `gc` from `pidgin_make_mini_dialog*`.
* Replace `PidginUtilMiniDialogCallback` by `PidginMiniDialogCallback`.
It is just a wrapper around the latter, with different argument order.
* Move minidialog wrappers from utils to `minidialog.c`. And fix naming/arguments to match the existing functions.

Testing Done:
Compiled, connected an account that had buddy requests, but didn't act on them.

Reviewed at https://reviews.imfreedom.org/r/788/
#define PIDGIN_ICON 104
#define PIDGIN_TRAY_AVAILABLE_4BIT 105
#define PIDGIN_TRAY_AWAY_4BIT 106
#define PIDGIN_TRAY_BUSY_4BIT 107
#define PIDGIN_TRAY_XA_4BIT 108
#define PIDGIN_TRAY_OFFLINE_4BIT 109
#define PIDGIN_TRAY_CONNECTING_4BIT 110
#define PIDGIN_TRAY_PENDING_4BIT 111
#define PIDGIN_TRAY_INVISIBLE_4BIT 112