clean up blurManager.py

[WillPower3309]

This is a horribly and needlessly complicated file, with hash vs imageHash vs imageHashPath etc, it could be optimized as well, lots of python list generator expressions that could likely be reduced down to one or two

[WillPower3309]

Will also likely involve changing paths.py

[WillPower3309]

Might be worth moving image generation / validation to a new file

[WillPower3309]

This will be updated as part of other v1.0 issues, leaving it up though as it could still be improved