[gnome-logs] Add UI file headers

[David King <davidk src gnome org>]

commit 496ccd907cc7975bebdb7a89838bfefd91a755d8
Author: Maximiliano Sandoval R <msandova gnome org>
Date:   Sun Oct 10 14:13:21 2021 +0200

    Add UI file headers

 data/gl-categorylist.ui    | 1 +
 data/gl-eventtoolbar.ui    | 1 +
 data/gl-eventviewdetail.ui | 1 +
 data/gl-eventviewlist.ui   | 1 +
 data/gl-searchpopover.ui   | 1 +
 data/gl-window.ui          | 1 +
 data/help-overlay.ui       | 1 +
 7 files changed, 7 insertions(+)
---
diff --git a/data/gl-categorylist.ui b/data/gl-categorylist.ui
index 74ef8b0..b6a118f 100644
--- a/data/gl-categorylist.ui
+++ b/data/gl-categorylist.ui
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <interface domain="gnome-logs">
     <template class="GlCategoryList" parent="GtkListBox">
         <property name="selection-mode">browse</property>
diff --git a/data/gl-eventtoolbar.ui b/data/gl-eventtoolbar.ui
index b48756c..df1cd3f 100644
--- a/data/gl-eventtoolbar.ui
+++ b/data/gl-eventtoolbar.ui
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <interface domain="gnome-logs">
     <menu id='primary-menu'>
         <section>
diff --git a/data/gl-eventviewdetail.ui b/data/gl-eventviewdetail.ui
index 3faae78..9ccbcde 100644
--- a/data/gl-eventviewdetail.ui
+++ b/data/gl-eventviewdetail.ui
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <interface domain="gnome-logs">
     <template class="GlEventViewDetail" parent="GtkPopover">
         <!-- The popover size is set such that it does not go beyond the window -->
diff --git a/data/gl-eventviewlist.ui b/data/gl-eventviewlist.ui
index 9edbcb8..9c31522 100644
--- a/data/gl-eventviewlist.ui
+++ b/data/gl-eventviewlist.ui
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <interface domain="gnome-logs">
     <template class="GlEventViewList" parent="GtkBox">
         <property name="orientation">horizontal</property>
diff --git a/data/gl-searchpopover.ui b/data/gl-searchpopover.ui
index e21d490..24e4fe0 100644
--- a/data/gl-searchpopover.ui
+++ b/data/gl-searchpopover.ui
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <interface domain="gnome-logs">
     <template class="GlSearchPopover" parent="GtkPopover">
         <signal name="closed" handler="search_popover_closed"/>
diff --git a/data/gl-window.ui b/data/gl-window.ui
index c9a3c3d..d0f929e 100644
--- a/data/gl-window.ui
+++ b/data/gl-window.ui
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <interface domain="gnome-logs">
     <template class="GlWindow" parent="HdyApplicationWindow">
         <property name="default-width">1200</property>
diff --git a/data/help-overlay.ui b/data/help-overlay.ui
index 219c85e..7287088 100644
--- a/data/help-overlay.ui
+++ b/data/help-overlay.ui
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <interface domain="gnome-logs">
     <object class="GtkShortcutsWindow" id="help_overlay">
         <child>