Build Protocol hangs if HST files present

[srkline]

when the panel opens, it's filtering through the files. It seems that if there are event files (.hst) present, it hangs and gives the spinning black ball of death.

Somewhere in the parsing, it must be trying to look through these enormous files. Figure out how to stop this.

[srkline]

when looking for DIV and MASK files, grep is used.

Before the grep operation, all files with pxp, hst, and other non-useful extensions are removed from the list so that time is not wasted looking through these files