Launcher: Make sure actions in Launcher are sorted

[fabiaserra]

Changelog Description

Sort action items by identifier so their order doesn't keep changing on every launch.

Testing notes:

1. Open Launcher
2. Actions should be sorted

[BigRoy]

@iLLiCiTiT isn't it much easier to just turn the sort role data here to e.g.:

            item.setData((action_item.order, action_item.identifier), ACTION_SORT_ROLE)

So that it sorts on the tuple of order, then identifier? Of course you can replace identifier there with e.g. nice display name if you prefer that.

The current fix seems a bit overkill and admittedly hard to grasp as well.

[iLLiCiTiT]

isn't it much easier to just turn the sort role data here to e.g.:

My experience with using python objects (tuple of 2 values) in role data of model are not very good, they usually fall apart when Qt wrapper of a DCC (or on different platform) tries to convert it to QVariant resulting in invalid value. It also does not handle TypeError to 100% avoid TypeError we should validate or autofix order and label in backend (can be done).

[fabiaserra]

works as expected, thank you @iLLiCiTiT !