Gnumeric 1.12.21 Andreas: * ODF import/export general plot data specifications. [#743818] * ODF import/export the z-index for line objects. * Fix ODF import of stroke colours of sheet objects. * Fix ODF import/export of fill colour and type. [#744051] * Fix ODF import/export of marker fill and outline colours. * Improve ODF export of manually positioned charts in multi-chart graphs. [#743789] * Fix ODF export of serieslines styles. * Fix ODF import/export of axes label visibility. [#743788] * ODF import/export additional axislines. * Fix ODF import/export of fonts in charts. [#744632] * ODF import/export additional axes. [#743787] * Fix ODF style import of secondary plots. [#744930] * Fix ODF style export for data points in plots. [#745091] Morten: * Implement xlsx import of sheet widgets. * Implement xlsx export of sheet widgets. * Fix xlsx import/export of patterns. * Plug leaks. * Arrow properties editor. [#158327] * Fix xlsx export of line style None. * Fix search-and-replace problem with text format. * Fix xlsx import/export of gradients. * Fix undo problems with scrollbars. * Fix spinner properties dialog. * SheetObjectImage fixes. * Fix problem reading images from xls. * Namespace fixes * Test suite improvements. * Fix various dtd version problems. --------------------------------------------------------------------------