0.12.3dev: Avoid adding duplicate plugin translation entries.
0.12.3dev: Avoid adding duplicate plugin translation entries.

Fix by wadatka. Closes #10294.


git-svn-id: 30ec3c1a2098df185a8733d0352d646269562639@10773 af82e41b-90c4-0310-8c96-b1721e28e2e2

exocad/exotrac,exocad/exotrac,exocad/exotrac,exocad/exotrac