ListSectionHeader: Fix up fillWidth condition for Heading label
Clean up import aliases and doc example
Fix up fillWidth condition for Heading label
There are two items now: heading itself and a trailing separator.
Amends 66af6c85
Remove label property
It does not add anything that you couldn't get using standard text property instead.
Note: the last one requires some porting . There are about 20 places in KDE that use the label
property of ListSectionHeader type.