Move to group works like add to group

[dfioravanti]

JabRef version 4.0-beta2 on Ubuntu 17.04 with oracle JVM

Steps to reproduce:

1. Add an entry to a group
2. Right click and press move to group
3. The entry is added to the new group but not removed from the old one

[lenhard]

I can confirm this.

@tobiasdiez What is the actual desired behavior for "Move to group"? Clear all prior groups and move it to the new one?

[dfioravanti]

I noticed another thing, dragging and dropping an entry into a group works as add to group too. No idea what is the indented behaviour but as user I would expect it to move the entry not to simply add it.

[tobiasdiez]

@lenhard, yes I also would expect "Move to group" to remove the selected entries from their previous groups and then adds them to the new one. It seems that https://github.com/JabRef/jabref/blob/master/src/main/java/org/jabref/gui/groups/GroupAddRemoveDialog.java#L176 is missing a if(move) { foreach group.removeEntries(...)} statement.

@diravan, I think you can control the drag & drop behavior by using the Ctrl (and/or Shift) modifier. I.e. holding Ctrl/Shift and drop the entries should move them.