Extend desktop file and name it according to the freedesktop specification

share/linux/keepassxc.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <mime-info xmlns='http://www.freedesktop.org/standards/shared-mime-info'>
   <mime-type type="application/x-keepass2">
-    <comment>KeePass 2 database</comment>
+    <comment>KeePass 2 Database</comment>
     <glob pattern="*.kdbx"/>
     <icon name="application-x-keepassxc"/>
   </mime-type>

share/linux/org.keepassxc.desktop

@@ -1,13 +1,16 @@
 [Desktop Entry]
 Name=KeePassXC
-GenericName=Community Password Manager
+GenericName=Password Manager
 GenericName[de]=Passwortverwaltung
 GenericName[es]=Gestor de contraseñas
 GenericName[fr]=Gestionnaire de mot de passe
 GenericName[ru]=менеджер паролей
+Comment=Community-driven port of the Windows application “KeePass Password Safe”
 Exec=keepassxc %f
+TryExec=keepassxc
 Icon=keepassxc
 Terminal=false
 Type=Application
-Categories=Qt;Utility;
+Version=1.0
+Categories=Utility;Security;Qt
 MimeType=application/x-keepass2;

snapcraft.yaml

@@ -42,7 +42,7 @@ parts:
       - libyubikey-dev
       - libykpers-1-dev
     install: |
-      sed -i 's|Icon=keepassxc|Icon=${SNAP}/usr/share/icons/hicolor/256x256/apps/keepassxc.png|g' $SNAPCRAFT_PART_INSTALL/usr/share/applications/keepassxc.desktop
+      sed -i 's|Icon=keepassxc|Icon=${SNAP}/usr/share/icons/hicolor/256x256/apps/keepassxc.png|g' $SNAPCRAFT_PART_INSTALL/usr/share/applications/org.keepassxc.desktop
     after: [desktop-qt5]
 
   # Redefine desktop-qt5 stage packages to work with Ubuntu 17.04