Make sidebar resizable
Adjusting the sidebar (possible in most apps) I can make the app look more balanced with my prefered window size.
Am I right in guessing that resizing has been disabled because of the split headerbar? It's actually not that hard to sync both paneds, just hard to find. Here's how it's done in a UI-file (like GEdit):
<object class="GtkPaned" id="PANEDINHEADERBARNAME"> <property name="position" bind-source="CONTENTPANEDNAME" bind-property="position" bind-flags="bidirectional|sync-create"/>
It can also be done with