Parameter framework modification

[thumDer]

I've modified the select_parameters function and the underlying ParamDef() a little:

• Now the IsReadOnly filter is optional instead of hardcoded, but the default behaviour stays the same (not showing ReadOnly). We have a lot of usecases where we need to get the ReadOnly parameters as well.
• I've modified the Parameter item_template to show if a parameter is ReadOnly, and also added a few extra info about the parameter itself into a ToolTip, to help identify the parameters.
• It follows that I had to modify the ParamDef() named tuple aswell, to contain the readonly attribute, and the parameter definition itself. The reason for the last one is that it is a much better way to get an elements parameter by their definition (parameter = Element.get_Parameter(Definition)) instead of their name with LookupParameter(string), because in actual projects parameter name duplications happen. A lot. This is also a reason for the added ToolTip

I've kept the order of the attributes for the ParamDef() to keep it backward compatible for commands that get the attributes from the tuple by their index instead of their name.

[eirannejad]

This is a great PR. Thank you! @thumDer