configure a robust CSS timeout only for load tests
use loader to load required modules for `coverage.html` and `load.html`

We manually list out all module dependencies in `get.html` to avoid
relying on `get` to test `get`. Since any issues arising from using
`get` to test `get` will be circumvented there, we can rely on `get` to
bootstrap the coverage and load tests. This will reduce the overhead of
keeping dependencies in sync across multiple files.
use default timeout of 10 seconds