@property doesn't work correctly with defaultValue for localizable strings

[andrewtelnov]

We can't use defaultValue for declearing localizable properties. A new attribute defaultStr has been introduced. Here is the example of using:

@property({ localizable: { defaultStr: "confirmRemoveFile" } }) confirmRemoveMessage: string;

This code will create localizable property and get the default value from localizable strings using the function in the gettter, istead of setting the default value from localization property on creating object.