parsers: added a error test to FemJsonParser
added dependencies to the custom build rules
fem: tweaked const correctness
Models: tweaked the bar series of models
Tweaked the scaling dialog
parsers: reverted error handling on FemJsonParser
Added a subdivision setting for the gradient policy
ui: added LoadPatternsModel
ElementRepresentationPolicy: Tweaked default subdivision
ui: Added model-view-controller to UI widgets that show LoadPatterns
Implemented a model-view-controller pattern for the domain and nodal loads dialog