NSIS: Include DisplayVersion in UninstallKey (backport 100d940)

Author: jef-n

ms-windows/QGIS-Installer.nsi

@@ -338,6 +338,7 @@ Section "QGIS" SecQGIS
 
 	;HKEY_LOCAL_MACHINE Uninstall entries
 	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${QGIS_BASE}" "DisplayName" "${COMPLETE_NAME}"
+	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${QGIS_BASE}" "DisplayVersion" "${VERSION_NUMBER}"
 	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${QGIS_BASE}" "UninstallString" "$INSTALL_DIR\Uninstall-QGIS.exe"
 	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${QGIS_BASE}" "DisplayIcon" "$INSTALL_DIR\icons\QGIS.ico"
 	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${QGIS_BASE}" "EstimatedSize" 1