ws: Fix display of 'Browser too Old' on old Internet Explorer
ws: Fix display of 'Browser too Old' on old Internet Explorer

The message for saying that the browser was too old wasn't getting
displayed on Internet Explorer correctly.

 * The word 'default' is a reserved word in (older?) javascript
 * Failure due to missing window.getComputedStyle method
 * The requisites() function was not being called early enough

Closes #9437
garrett/cockpit,mvollmer/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,cockpituous/cockpit,mvollmer/cockpit,cockpituous/cockpit,deryni/cockpit,SotolitoLabs/cockpit,deryni/cockpit,cockpit-project/cockpit,cockpituous/cockpit,andreasn/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,mareklibra/cockpit,moraleslazaro/cockpit,SotolitoLabs/cockpit,deryni/cockpit,SotolitoLabs/cockpit,SotolitoLabs/cockpit,andreasn/cockpit,mvollmer/cockpit,andreasn/cockpit,martinpitt/cockpit,SotolitoLabs/cockpit,cockpituous/cockpit,andreasn/cockpit,mareklibra/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,mareklibra/cockpit,mvollmer/cockpit,andreasn/cockpit,cockpit-project/cockpit,martinpitt/cockpit,deryni/cockpit,mareklibra/cockpit,martinpitt/cockpit,mareklibra/cockpit,cockpituous/cockpit,mareklibra/cockpit,deryni/cockpit,SotolitoLabs/cockpit,mareklibra/cockpit,andreasn/cockpit,deryni/cockpit,garrett/cockpit,deryni/cockpit,SotolitoLabs/cockpit,andreasn/cockpit,cockpit-project/cockpit,garrett/cockpit,martinpitt/cockpit,garrett/cockpit,moraleslazaro/cockpit,garrett/cockpit,cockpit-project/cockpit