Add proxy question to issue template (#704)

.github/ISSUE_TEMPLATE/bug-report.md

@@ -13,6 +13,8 @@ assignees: ''
 - Azure Account Extension Version:
 - OS Version:
 
+Are you connected to a proxy server? Yes/No
+
 Steps to Reproduce:
 
 1.

.github/ISSUE_TEMPLATE/cannot-list-subscriptions.md

@@ -15,4 +15,4 @@ assignees: ''
 
 Does your account belong to more than one directory? (see your directories [here](https://aka.ms/AAevnvr)): 
 
-Any other information about your Azure account that may be useful: 
+Any other information about your Azure account that may be useful: