PmTable: fixed in-memory filter and sort problem.
- The filter and sort operations now consistently related to the beans
to sort.
- The deleted PM context evaluator used a different root object for
expressions, which introduced problems.
deprecated PmTableColCfg: removed unused filterType attribute.
Update README.md
Removed unused import
Converter message enhancement:
Added the error message causing exception to converter message.
Merge branch 'master' of https://github.com/pm4j/org.pm4j