Unexpected enabling of the button create workspace

[artaleks9]

When I try to create new workspace without a name, the create button is enabled. But it should be disabled.

Reproduction Steps:

• Go to 'Dashboard' -> 'Create Workspace -> 'Create new workspace from stack'.
• Select a stack and delete a name of workspace.
• Try to press on the create button.

Expected behavior:
The create button should be disabled.

Observed behavior:
The create button is enabled.

Che version: 5.0.0-M7
OS and version: Ubuntu 14.04
Docker version: 1.12
Che install: Docker container

Additional information:

• Problem can be reliably reproduced, doesn't happen randomly: Yes
• See the attachment: