Traditionally, the class pages were modelled after the Qt C++ documentation. There was a brief description, ending with a reference to the detailed explanation, labelled "more..". While this actually works in sphinx, too, it starts to emit warnings about multiple definitions of the 'more' label. To fix this, introduce a sphinx collapsible directive, expanding to the detailed description. This however only works unless the detailed description has headlines (for example, for QObject). This creates a difference in that the detailed description is always initially hidden, but it is assumed that this is better for the common use case of browsing for a certain method. Pick-to: 6.10 6.9 6.8 Task-number: PYSIDE-1106 Change-Id: I152be16f2a5ee5ea8c2869396a207b554738b219 Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>