general: Change user-facing name to Image Viewer

This is part of the move to Core.

Part-of: <https://gitlab.gnome.org/GNOME/loupe/-/merge_requests/256>

data/gtk/window.ui

@@ -51,7 +51,7 @@
         <attribute name="action">win.show-help-overlay</attribute>
       </item>
       <item>
-        <attribute name="label" translatable="yes">_About Loupe</attribute>
+        <attribute name="label" translatable="yes">_About Image Viewer</attribute>
         <attribute name="action">app.about</attribute>
       </item>
     </section>
@@ -61,7 +61,7 @@
     <property name="default-height">498</property>
     <property name="width-request">360</property>
     <property name="height-request">360</property>
-    <property name="title" translatable="yes">Loupe</property>
+    <property name="title" translatable="yes">Image Viewer</property>
     <signal name="notify::fullscreened" handler="on_fullscreened" swapped="yes"/>
     <binding name="title">
       <closure type="gchararray" function="window_title">

data/org.gnome.Loupe.desktop.in.in

@@ -1,5 +1,5 @@
 [Desktop Entry]
-Name=Loupe
+Name=Image Viewer
 Exec=loupe %U
 Icon=@APP_ID@
 DBusActivatable=true
@@ -7,5 +7,5 @@ Terminal=false
 Type=Application
 Categories=GNOME;GTK;Graphics;2DGraphics;RasterGraphics;Viewer;
 MimeType=@MIME_TYPES@
-Keywords=Picture;Slideshow;Graphics;Image Viewer;
+Keywords=Picture;Slideshow;Graphics;Loupe;
 StartupNotify=true

data/org.gnome.Loupe.metainfo.xml.in.in

@@ -3,7 +3,7 @@
   <id>@APP_ID@.desktop</id>
   <metadata_license>CC0-1.0</metadata_license>
   <project_license>GPL-3.0-or-later</project_license>
-  <name>Loupe</name>
+  <name>Image Viewer</name>
   <developer_name>The Loupe Team</developer_name>
   <summary>View images</summary>
   <description>