D-7

v-2.1
---
1. write_Log

    ==> done
D-7

v-3.0
---
1. ShowLog => filtering feature
2. option GUI

    ==> done
D-7

v-3.1
---
1. create table: tname_FilterHistory

    ==> done
D-7

v-3.2a
---
1. filter
2. up to => reset

    ==> done
D-7

v-3.2b
---
1. filter

    ==> done