* Set geometry
  - setMinimumSize(), do not fix the size of the widget based on the number of rows
    or it will get too big
  - Minimum QSizePolicy both vertically and horizontally to not make its
    parent widget expand too much
* Add vertical scrollbar
  - Leave room for the scrollbar to appear
  - Make scrollbar recalculate with widget resizes
    - Use kpColorCellsBase's new setCellsResizable() method
    - Delete resizeEvent() which prevented resize events reaching QTableWidget
      via kpColorCellsBase

* Fix appendRow() and deleteLastRow() to add and delete _visual_ rows,
  independent of whether the current number of colors is divisible by
  the columnCount() [currently fixed at 11]
  - If you delete an only remaining row, the effect is to clear the
    row [see ensureHaveAtLeastOnRow()]
  - Adding only adds the invalid color, which kpColorCollection -- as of a recent
    commit -- no longer saves anyway

* Set modified flag more consistently by using kpColorCellBase's new
  colorChanged() signal connected to the new slotColorChanged()
  - drag-and-drop now updates the modified flag and backing color collection
    - this supports drops to empty color cells

* Remove HACK of specifying 300 columns to kpColorCellsBase in the ctor,
  since setRowCount() and setColumnCount() now work

* Add WhatThis

* Fix makeCellsMatchColorCollection() to support invalid colors (empty cells)
  in the new color collection (by clearing the old cells, which might not have
  been empty)

* Rename static ::Palette*() methods to ::Table*() methods to be less confusing
* Reintroduce special handling of 0 cells

* Replace the hacky mouseReleaseEvent() with the new slotColorSelected()
  (using the new overload of the kpColorCellsBase::colorSelected() signal)
  - Remove fragile d->mouseButton hack

* Emit rowCountChanged()
* Emit isModifiedChanged() in setModified()

* Remove dropEvent() since it did nothing

* Remove paintCell() (a non-functional leftover from KolourPaint in KDE 3)
  as kpColorCellsBase now does what it did (gray out cells when disabled)

* Style, TODO, comments

TODO: Swapping colors around and deleting a row results in strange effects.

svn path=/trunk/KDE/kdegraphics/kolourpaint/; revision=716617