CertXplorer - Use TypeDescriptionProvider

[odalet]

At the moment, dictionaries are not expanded in the property grid unless the following attribute is declared on top of the property:

[TypeConverter(typeof(ReadOnlyDictionaryConverter))]        

We should create a global TypeDesciptionProvider that would handle this automatically for all dictionaries. It would also allow to support other types.

Once this is done, rewrite the PemData class of the PemPlugin; it won't need any more the inner ComplexPemDataclass.

It may also be useful to get rid of the various wrappers in Delta.CertXplorer\CertManagers\Wrappers as they only exist so that the property grid supports the wrapped types.

Inspiration should be found in the Hawkeye2 source code as it makes extensive use of TypeDesciptionProvider.