fix: Remove unnecessary theme_init call (mem leak)

Simple `ui_resize` is sufficient for rerendering all the elements.
Other calls create complexity, slow down the applications and even introduce mem leaks.

`ui_resize` technique is already used widely, including `cmd_editor` case.

Fixes #4

src/event/server_events.c

@@ -156,14 +156,7 @@ sv_ev_roster_received(void)
         if (!p_gpg_valid_key(account->pgp_keyid, &err_str)) {
             cons_show_error("Invalid PGP key ID specified: %s, %s", account->pgp_keyid, err_str);
         }
-
-        // Redraw the screen after entry of the PGP secret key, but not init
-        ProfWin* win = wins_get_current();
-        auto_gchar gchar* theme = prefs_get_string(PREF_THEME);
-        win_redraw(win);
-        theme_init(theme);
         ui_resize();
-        ui_show_roster();
     }
     account_free(account);
 #endif