when attempting to remove a breakpoint from a group, the only way to do it is to:
1) right-click the breakpoint node in the breakpoint window
2)choose Set Group Name (the same contextual item you choose to add a breakpoint
to a group in the first place)
3) click ok without entering a name

in addition, if you enter a new name in step 3, the whole group's name is
changed when all you wanted to do is to remove a single member from it...

this is strange and should be changed - i suggest adding a "Remove breakpoint
from Group" contextual item (a "Add breakpoint from Group" contextual item is
also necessary) to cover this case as well as allow users to change the name of
a group that includes several breakpoints...

also, the above-mentioned dialog name should be changed as well as it is awkward
- maybe simply using "Set Breakpoint Group Name" would suffice...