Don't add a top margin to AdwPreferencesPage and AdwStatusPage if AdwHeaderBar:show-title is set to "false"
Affected version
1.5/1.6.alpha
Description
When using AdwPreferencesPage (without AdwPreferencesPage:description) or AdwStatusPage together with AdwHeaderBar:show-title set to FALSE, there is a bit gap between the headerbar and the page contents, which looks weird and consumes vertical space unnecessarily:
AdwStatusPage
AdwPreferencesPage
Edited by Automeris naranja