Gnumeric 1.12.12 Andreas: * Fix ODF roundtrip of some header/footer markers. [part of #724487] * Fix ODF roundtrip of preferred window size. [part of #724487] * Fix ODF number roundtrip issue. [part of #724568] * Fix ODF error constant roundtrip issue. [part of #724568] * Fix import of underlines from LO-generated ODF files. [part of #724763] * Fix ODF viewport roundtrip issue. [#724761] * Fix ODF pagesetup roundtrip issue. [#724516] * Fix ODF pattern roundtrip issue. [#724898] * Export row and column visibility to ODF. [#725115] * Export frozen panes info to and import from ODF. [#725228] * Export and import more sheet properties to/from ODF. [#725258] * Fix validation import from ODF. [#725321] * Fix autofilter condition export to ODF. [#725458] * Provide Undo for sheet reordering via tab dragging. [#725540] Jean: * Fix persistence of hyperlinks tips. [see #724108] * Fix background filling for rtl sheets. [#725276] Morten: * Fix BIFF7 import of long strings. [#724399] * Improve testing. * Fix XLSX number roundtrip issues. * Improve ssdiff's report of differences. * Improve LOG2's accuracy. * Fix BIFF7 export of page headers and footers. * Fix BIFF7 export of font rotation. * Fix xlsx export of underlines. * Fix BIFF8 export of diagonal borders. * Export headers and footers to xlsx. [Part of #724516] * Import headers and footers from xlsx. [Part of #724516] * Fix xls export of long strings in formulas. * Fix xls import of cells with long string results. * Fix xls export of long strings in various places. * Fix BIFF7 export of comments. * Improve style handling when expanding sheets. * Fix xls export of headers and footers. [Part of #724516] * Fix xls import of headers and footers. [Part of #724516] * Fix xlsx export of row heights. * Fix xlsx export of rotated styles. * Make window geometry round-trip through xlsx. * Fix xlsx import of comments. * Work around gtk+ criticals. [#725142] * Fix xls/biff8 export of long comments. [#725168] * Fix xls/biff8 import of comment's text attributes. [#725168] * Improve the xls macro-roundtrip situation. [#725220] * Improve ssdiff for sheet attributes. * Fix split pane problem. [#725375] * Don't generate value format during xls read. [#725453] * Fix name criticals. * Fix sheet duplication issue. [#725504] * Fix named expressions crasher. [Part of #725459] * Fix GUI sheet re-ordering mess. [Part of #725459] --------------------------------------------------------------------------