App to be removed by updates shows as if it has an update

[jacobgkau]

Description: If an application is going to be removed by applying updates (due to updated dependencies conflicting with the package), the application shows up in the Updates list even though it's already up-to-date. Attempting to update it or Update All will throw an error dialogue since there's no update available.

Steps to reproduce: Test by adding popdev:conflict-with-popsicle and then showing the Updates page. This staging repo updates pop-desktop to conflict with popsicle, and does not update popsicle (this can be verified with apt). However, Popsicle shows up in the Updates list as if it has an update available.

This is the error when clicking Update on Popsicle:

Expected behavior: If an application is up-to-date, it shouldn't show up in the Updates list or have an Update button.

Version: This was reproduced on version 0ea4e16.