ENH: Implemented DICOMDetailsPopup as window and dialog
- default: DICOMDetailsDialog which is bound to the mainWindow and slides in from top
- closing with esc (which could be improved)
- when using DICOMDetailsWindow, it always says on top
- resize/move event are overridden called and saves the dimensions to the settings for next call
- old ones like DICOMDetailsPopup and DICOMDetailsDock should be removed since they don't improve any usability