MDW License Manager v0.5.5

Create License Double-Submit Protection
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Fixed:
- Create License now includes a one-use request token.
- If the Create License form is submitted twice, the second request is blocked instead of creating a duplicate key.
- The Create License button is disabled while the request is processing.
- User should close/reopen Create License to create another separate license.

Also keeps:
- Reassign Customer in License Details.
- Delete License for mistaken/unused licenses.
