The basic idea is to provide an option to force smartgit to a single instance. The basic use case behind this idea is to open git folders with smartgit via context menu out of a file manager (e.g. with ubuntu nautilus file manager right click on git folder and open with smartgit). Over this way the file manager passes the folder path to smartgit and I don't need to add the repository manually in smartgit.
Currently smartgit opens foreach folder that I open over this way an new instance - that's confusing.
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