441605 psd: mark read layer styles as valid
PSDLayerStyles, once read, are never marked as valid. This MR ensures they are before sending them over to the resource system.
Test Plan
Build Krita. Open the PSD file referenced in ISO-441605.
Formalities Checklist
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I confirmed this builds. -
I confirmed Krita ran and the relevant functions work. -
I tested the relevant unit tests and can confirm they are not broken. (If not possible, don't hesitate to ask for help!) -
I made sure my commits build individually and have good descriptions as per KDE guidelines. -
I made sure my code conforms to the standards set in the HACKING file. -
I can confirm the code is licensed and attributed appropriately, and that unattributed code is mine, as per KDE Licensing Policy.