Added persistent "always display" expression support (button below the logger tree).  The 'always display' expression overrides hidden loggers and the hidden expression but not the refine focus filtering mechanism.  Often used with expressions like 'exception exists || level > warn' to ensure errors and exceptions are not filtered out due to the hidden expression or hidden logger mechanism.

git-svn-id: https://svn.apache.org/repos/asf/logging/chainsaw/trunk@1178301 13f79535-47bb-0310-9956-ffa450edef68
4 files changed