* Moves multi reader initialization
* Log error message if not able to open file
* Make keywordCount pure virtual
The base class `RifSummaryReaderInterface` is changed to be abstract and the `keywordCount` is declared as a pure virtual method, therefore the derived classes must implement the method.
This will ensure that all readers are responsible for reporting a keyword count.
* Ensures addresses are created if required
Calls `createAddressesIfRequired` on the summary reader to ensure addresses are created before accessing keyword count.
This prevents potential issues when the addresses haven't been initialized yet.
Make sure statistics curves are recomputed on flag change
When toggling "Discard Missing or Incomplete Realizations", make sure the statistics is recomputed and the ensemble plots updated.
Magne Sjaastad