Remove unused and soon to be deprecated props

src/iridium-window.ui

@@ -117,7 +117,6 @@
                     <child>
                       <object class="GtkListBox" id="tag_list">
                         <property name="visible">True</property>
-                        <property name="expand">True</property>
                         <signal name="row-selected" handler="on_tag_selected" object="IridiumWindow"/>
                         <style>
                           <class name="list-box"/>
@@ -132,7 +131,6 @@
                         <child>
                           <object class="GtkListBox" id="note_list">
                             <property name="visible">True</property>
-                            <property name="expand">True</property>
                             <signal name="row-selected" handler="on_note_selected" object="IridiumWindow"/>
                             <style>
                               <class name="list-box"/>