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Fixes and enhancements for CAS monitoring.
Fix: set empty addr for new host, so it'll be filled with actual address when connected for the first time.
Fix: move TR/exception packing to ZicoUtil, drop unnecessary exceptions from stack traces returned to UI.
Fix: MethodAttrDialog and TraceRecordSearchDialog gray areas below lists.
Fix: host state wasn't saved to disk while disabling/enabling host.
Fix: trace call tree popup -> status bar, fix 'Expand All' button behavior.
Fix (agent): file paths and log buffering on windows.
Deprecate zorka viewer (it'll be still there for testing purposes but not part of distribution).