pagecolor attribute is interpreted differently in 1.2 (vs older versions) creating a minor discrepancy
<!-- See our full bug reporting guidelines at https://inkscape.org/contribute/report-bugs/ Writing a good bug report will ensure we'll be able to help efficiently. 🙂 --> #### Summary: <!-- Summarize the issue/suggestion concisely: --> In 1.2-dev pagecolor affects the color of the page(s) of a document; In older versions, changing the attribute changed the color of the entire canvas (beyond the boundary). Opening a file with non-white page color gives (visually) different results in 1.2 and older versions. #### Steps to reproduce: <!-- Describe what you did (step-by-step) so we can reproduce: --> - open Inkscape 1.1.1 - Change page color - save document as an Inkscape svg - Reopen file in 1.2-dev #### What happened? - Page color is applied only within the page #### What should have happened? - Perhaps inkscape:deskcolor should have been set to page color? (I am not really sure here :sweat_smile:) Sample attachments: <details><summary>Sample SVG</summary> ![drawing.svg](/uploads/6caa1c225a7251c914ec89f13cd8c4c5/drawing.svg) </details> #### Version info <!-- Open 'Help > About' and click on the little bug icon in the bottom right corner that copies the debug information to your clipboard. For command line users, run 'inkscape --debug-info'. For Inkscape 1.0.2 and older, please manually add the Inkscape Version and Operating System Version. The Inkscape version is listed in the About dialog. For command line users, run 'inkscape -V' Paste the information in the empty space between the apostrophes below: --> ``` Inkscape 1.2-dev (5fd7b64, 2021-12-23) GLib version: 2.64.6 GTK version: 3.24.20 glibmm version: 2.64.2 gtkmm version: 3.24.2 libxml2 version: 2.9.10 libxslt version: 1.1.34 Cairo version: 1.16.0 Pango version: 1.44.7 HarfBuzz version: 2.6.4 OS version: Ubuntu 20.04.3 LTS ``` <!-- ❤️ Thank you for filling in a new bug report, we appreciate the help! ❤️ Please be patient while we try to find the time to look into your issue. Remember that Inkscape is developed by volunteers in their spare time, we'll try our best to respond to all reports. --> <!-- Please be careful when/after writing # for example in logs, code, or versions of linux - use inline code span - single backticks (`) before and after it, like this - `inbox#1618` - use multi-line code block - triple backticks (```) to fence/enclose console logs - attach long logs as a text file. -->
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