Refactoring - Unify error management at GUI level #205
Description
When a technical issue is appearing, the exception is not always displayed in the GUI. Often, the exception appears in logs but nothing is rendered, so the end users don't know what happened in such cases.
When a technical exception is thrown, it should be displayed so the end users are informed that something went wrong. So, TradistaTechnicalExceptions should be managed similarly to TradistaBusinessExceptions in Controllers. The method to render exceptions should be extracted in a single place so all controllers make uses of it.
Consider the same mechanism for the web part as well.