Query/Retrieve accessible as tool on main window with adjustable presets

[mkauzlar]

Is your feature request related to a problem? Please describe.
Every time I need to retrieve some studies from the PACS I need to go to Import DICOM --> Q/R --> Set the search parameters which are reset all the time --> Import

Describe the solution you'd like
It would be handy to have a Q/R button on the toolbar with defaults that can be set there (Modality, Time: Today, Yesterday, last week etc). Clicking again on Q/R button should continue querying with the last presets giving a list of results. At this point one just chooses the Study which gets automatically imported.

Thank you

[nroduit]

Implemented in #237 and #400