* fixes sample6, yahoo resizing
* added BasicTableLayoutStrategy::ColIsSpecifiedAsMinimumWidth helper function,
which tells us if the given column has a width attribute that means "make me as small as possible"
* nsTableFrame methods now no longer use mCellMap directly, they ask for it from
GetCellMap which gets the cell map from the first-in-flow. Only the first-in-flow has a
cell map because the cellmap refers to the table as a single object, not to each table frame.
* Likewise, continuing table frames do not call BalanceColumnWidths or SetTableWidth
which are "global" operations. Responsibility for these lies with the first-in-flow.
git-svn-id: svn://10.0.0.236/trunk@8020 18797224-902f-48f8-a5cc-f745e15eee43
b7b8a5e07f