Reduce storyboard number of changes

[fernandodelrio]

The storyboard's XML is read, modified and then rewritten. The order of the tag's properties will probably change every time (AEXML won't keep the original order). This is bad considering that a diff will accuse a whole file difference on all storyboards, making a Code Review harder.
Need to check if it's possible to rewrite the storyboard with the minimum of changes (with the diff only accusing the real changes made)

[fernandodelrio]

Moving issue to the SwiftColorGenLibrary repo