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Kristian Rietveld authored
If we have a level with zero visible nodes and the first node becomes visible in that level, then parent has just become a "real" parent node. In such a case we need to emit row-has-child-toggled. This only applies to non-root levels that have a parent. This problem was also found when writing the unit test, the respective cases in the unit test have been corrected. This fixes bugs: Bug 372010 - Filtering not working properly Bug 525965 - Filtered and sorted GtkTreeView is missing rows
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