Adds references to two .glade files to the plugins Makefile that were mistakenly omitted during the migration of the publishing UI to Glade. Closes #5350.
Adds references to two .glade files to the plugins Makefile that were mistakenly omitted during the migration of the publishing UI to Glade. Closes #5350.

damianmoore/shotwell,ritchiewilson/shotwell,polymeris/shotwell,h4ck3rm1k3/shotwell,h4ck3rm1k3/shotwell,abrauchli/shotwell,polymeris/shotwell,jimbonator/shotwell,ritchiewilson/shotwell,ritchiewilson/shotwell,abrauchli/shotwell,h4ck3rm1k3/shotwell,jimbonator/shotwell,jimbonator/shotwell,abrauchli/shotwell,polymeris/shotwell,damianmoore/shotwell,damianmoore/shotwell