Summary Import : Improve GUI for ESRMY files

[magnesj]

Currently, all summary import is based on a SMSPEC file. Based on settings in Preferences, either libecl, H5 or ESRMY files will be imported.

This behaviour can be confusing. It will help the user understand what is happening by directly showing the ESMRY file and allow the user to select this file. It can happen that ESMRY is the only file with summary data in a folder.

This improvement is suggested by @tskille

[tskille]

I also hope that this dialog (import ensemble) could be updated in a way that the user can choose to use SMSPEC or ESMRY in the filer when finding simulations

[hhgs]

When opm-common/ESMRY is set as import format for Summary data, add *.ESRMY as file extension to file browsers:

• Import Eclipse Files
• Import Summary Case / Recursively / Group
• Import Ensemble

Possible use case: No SMSPEC or UNSMRY files are exported, only ESMRY. Read ESMRY header to get overview of vectors and time steps. Read RSTEP when loading vector data to get current number of time steps - to support ongoing simulation runs.

[magnesj]

The import dialog for ensemble data is updated, but other summary import dialogs require updates.