Repo browser permits deletion of external linked item from parent

Amazing utility, here is the issue.

v1.8
In the repo browser, an external source item @ HEAD can be deleted from the from the parent project with the external property. This is inconsistent from the shell and context menu behavior.

note: url paths are shown as "repo:///" for this example, but it should be understood these are correctly formatted paths.

----
Setup.
repo:///lib/trunk/item.c is external URL source with several commits from revision 60 through 80.
repo:///project/trunk has 
   svn:externals property
   local path: item.c 
   repo:///lib/trunk/item.c
   Peg: 60
   Operative: 60
Repo HEAD version is 80
Checkout repo:///project/trunk to c:/project_test/ will
create working copy 
c:/project_test/item.c @ revision 60
----
Shell behavior (correct, expected)
svn delete c:/project_test/item.c in shell gives 
svn: e155030: Cannot remove the external at 'c:/project_test/item.c' ; please edit or delete the svn:externals property on 'c:/project_test/'
----
context menu (correct, expected)
right click on c:/project_test/item.c, no SVN delete item available.
----
repo browser (inconsistent)
In repo browser, select external repo:///project/trunk
item.c is shown as external at revision 60.
Select item.c, the repo browser shows it as an external, with revision 60 at URL repo:///lib/trunk/item.c
Delete item.c by selecting the repo:///project/trunk
item.c and press delete and enter log message.
Result: The repo:///project/trunk/item.c does not change as it is pegged to revision 60. BUT repo:///lib/trunk/item.c @ HEAD is now deleted.
Expected/Desired: Delete not permitted. A delete would only be permitted if the external was not pegged. If pegged possibly permit delete with warning of resulting action.
Note: shell and context menu do not permit delete even on non re-visioned externals. Repo browser permits delete of non revisioned external, same result as revisioned, but icon changes to external folder.
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