Description of problem:
The "Create new secret" modal disappears and loses all inputs if user CARELESSLY click outside the modal. Below take BC edit page for example. Other pages with the "Create new secret" have same issue.

Version-Release number of selected component (if applicable):
v1.4.0-alpha.0+f69b28e-909 (vendored
upon origin-web-console commit 34067a1)

How reproducible:
Always

Steps to Reproduce:
1. Create BC
2. Go to BC editor page, hit "advanced options", hit "Create new secret"
3. It will show a modal (i.e. window) for inputs. Try to input secret name "mygit", input user "bob", input password "12345678". Then click a place outside the modal (which customer may carelessly do)
3.

Actual results:
2. After click outside the modal, the modal disappears. Hit "Create new secret" again, all previous inputs are lost. Customer has to input all again.

Expected results:
2. The modal should not disappear if click outside the modal

Additional info:
This may be the characteristics of modal, but it indeed causes careless inconvenience.