Capability defaults are split between Match Capabilities and New Session

[InstyleVII]

Currently upon read-through of the spec defaults for capabilities are in two different sections. There is an initial list mentioned in Match Capabilities which defines some defaults for comparison although they aren't called out as defaults they are used for comparison to validate.

Then in New Session there are defaults specified for pageLoadStrategy and timeouts.

These should be consolidated in some way (I'd argue the ones in New Session should be moved into Match Capabilities).