Rename Contant ot ConStant
[#166] Support GetConstantValueOrDefault method for Config manager
#164 Create use method in Sigleton to use singleton inside
#165 Support system log collector
[#7] Error occuring when ViewModel has protected virtual property
[#133] Support ViewModel controllers
[#134] Create GUI-extensions to show model without manual creation
[#137] Allow to rename dialog buttons
[#150] Split UiInvokator for extrant Inoke method
[#149] Support message box titling