fast focus: worked around an IE10 bug
disabled the IE warning

... I do actually support that platform (yuck).
removed a few unintended references to Discworld
do not throw if merely not connected

I added MUD-specific code to handle unhandled throws as fatal errors,
displayed as a "oops" to the user and reported to the server. So
exceptions shouldn't be thrown for common errors.
disable F1 and F5 browser actions

Disabled the built-in browser actions for F1 and F5, so that MUDs may
define macros for these keys without bad side effects.