2118: ** Separate CssBox and Props

1. still error!
2. CssBox store css properties in CssSpec
    CssSpec can be shared between CssBox
2119
2120: developing ...
2105
2107:err
2108:err
2118
2120
Merge branch '1.7.2105' into 1.7dev
2105.3
2105.4
2105.5
2105.6
2105.7
2105.8
2105.9
2105.10
2105.12
2105.13
2105.15: remove CssBoxBase