rotation/location limit toggles do not work depending on global settings

[Luke Graybill]

(using latest commit at this time, 387a707) 

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When the checkboxes are unchecked in global settings, the toggle buttons in the posing panel are non-functional.

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It is unclear what the checkboxes in settings are meant to do, but it seems like they either disable the limits feature completely (in which case, the toggles in the posing panel should probably not show at all) or they define the initial state of the toggles in the posing panel (in which case, the toggles are broken because they don’t do anything at all).

[Thomas Larsson]

The global settings are import options. If limits and locks are disabled there, they are not generated when the character is imported, and cannot be toggled later. The toggle buttons are now greyed out in that case.

[Luke Graybill]

Very nice, thank you Thomas!