We were outsmarted by a combination of gtk-builder-tool
removing default values and GtkGrid guessing good values
for omitted properties.
Fixes: #3080
<property name="xalign">1</property>
<layout>
<property name="row">1</property>
+ <property name="column">0</property>
</layout>
</object>
</child>
<object class="GtkEntry" id="open_popover_entry">
<property name="activates-default">1</property>
<layout>
+ <property name="row">0</property>
<property name="column">1</property>
<property name="column-span">2</property>
</layout>