small ui update
implemented feature: delete of category in ui
changed colors of buttons
go button: colorful, so everybody can find it
request/response: normal, and smaller, because it is not so necessary
fixed delete button in paneltop
based on Feedback from Stefan Rickauer
Message selection is now based on httpmessage id
implemented select all / invert on table header in panelleft (so lazy people can attack ALL parameters...)
based on Feedback from Stefan Rickauer