Batch Explorer pool creation dialog does not show available custom images

**Describe the bug**
I have several images in region 'X' of my Azure subscription, as well as a Batch Service in the same region. Several weeks ago, I was able to create a new pool as a custom image and select an existing image.

**To Reproduce**
Steps to reproduce the behavior:
1. Create a generalized image from a virtual machine
2. Ensure there is a batch service in the same region
3. Open Batch Explorer and try to create a new pool, selecting "Custom Image."

**Expected behavior**
The Image dropdown in the custom image area should list the images that are found in the same region.

**Screenshots**

**Logs(Click profile > View Logs > app.log, client.log)**
none

**Version (please complete the following information):**
- OS: Windows 10
- Batch Explorer: 2.7.0-stable.418