core: keep tank infos in a dynamic table

The list of known tank types were kept in a fixed size table.
Instead, use a dynamic table with our horrendous table macros.
This is more flexible and sensible.

While doing this, clean up the TankInfoModel, which was leaking
memory.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

core/divelist.c

@@ -1395,6 +1395,8 @@ void clear_dive_file_data()
 	reset_min_datafile_version();
 	clear_git_id();
 
+	reset_tank_info_table(&tank_info_table);
+
 	/* Inform frontend of reset data. This should reset all the models. */
 	emit_reset_signal();
 }