Casper Signer | 'Signature request' screen | Extension's 'Signature request' window looks clamped comparing dedicated window

[karatnyk]

Steps to reproduce:

1. Initiate a token transaction on cspr.live website
2. On 'Sign' step click on 'Sign with Casper Signer' button
3. Observe that 'Signature Request' window appeared
4. Open Casper Signer's native screen by clicking on extensions's icon
5. Compare 'Signature Request' window and Casper Signer's native screen

Expected result: Casper Signer's native screen should be resized in order to show UI elements properly (like on 'Signature Request' window)
Actual result: Extension's 'Signature request' window looks clamped comparing dedicated window