noscript info dialog improvements

[diracdeltas]

Test Plan:

• go to vox.com
• disable scripts in the brave panel
• hit the noscript icon, uncheck everything except vox and vox-cdn checkboxes. click inside the dialog and the dialog should not disappear.
• hit one of the allow buttons. the page should reload, and vox images should appear.

changes:

• make it easier to click the checkboxes. fix Hit boxes on allow scripts are too small, create unintended modal closure when missed. #7430.
• do not close the dialog unless clicking outside or on a button.
• make the dialog the same whether noscript is globally enabled or not.
• if no checkboxes are checked, clicking the button should be a no-op.

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

[alexwykoff]

testing now

[alexwykoff]

default allow all on open is perhaps a little odd, but otherwise looks good to me.

[alexwykoff]

@diracdeltas are there any tests which cover this feature?

[diracdeltas]

@alexwykoff yes, the noscript test

[bbondy]

++