[gimp] app: Halve the rate of distance-based drag-to-zoom scaling

[Jehan <jehanp src gnome org>]

commit 4cffd91af4319b3431603e19a04939bd629fb8ae
Author: woob <thetoastcaper gmail com>
Date:   Tue Mar 1 18:52:49 2022 -0500

    app: Halve the rate of distance-based drag-to-zoom scaling
    
    Reduces the rate from +/- 1% of the current scale per pixel, to 0.5% to
    allow for more fine control while zooming.

 app/display/gimpdisplayshell-scale.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/app/display/gimpdisplayshell-scale.c b/app/display/gimpdisplayshell-scale.c
index 3f443c650c..c840f962f9 100644
--- a/app/display/gimpdisplayshell-scale.c
+++ b/app/display/gimpdisplayshell-scale.c
@@ -819,7 +819,7 @@ gimp_display_shell_scale_drag (GimpDisplayShell *shell,
         {
           gimp_display_shell_scale (shell,
                                     GIMP_ZOOM_TO,
-                                    scale * exp (0.01 * delta_y),
+                                    scale * exp (0.005 * delta_y),
                                     GIMP_ZOOM_FOCUS_POINTER);
         }
       else if (delta_y > 0.0) /* drag_zoom_mode == PROP_DRAG_ZOOM_MODE_DURATION */