[gimp] app: remove legacy color-erase mode from the layer mode combo

[N/A <ell src gnome org>]

commit 6f7d95c21c00824629c94bee217d43abf770cb63
Author: Ell <ell_se yahoo com>
Date:   Mon Oct 16 16:15:00 2017 -0400

    app: remove legacy color-erase mode from the layer mode combo
    
    It was accidentally made applicable to layers by commit
    7d345071c7d1c0de007e6966f963fae06f9a2159.  Only the non-legacy
    color-erase mode shoule be applicable to layers (since 2.8 didn't
    allow it as a layer mode), while the legacy mode is only available
    for painting, and in the fade dialog.

 app/operations/layer-modes/gimp-layer-modes.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/app/operations/layer-modes/gimp-layer-modes.c b/app/operations/layer-modes/gimp-layer-modes.c
index 528102d..55840c8 100644
--- a/app/operations/layer-modes/gimp-layer-modes.c
+++ b/app/operations/layer-modes/gimp-layer-modes.c
@@ -363,7 +363,8 @@ static const GimpLayerModeInfo layer_mode_infos[] =
                             GIMP_LAYER_MODE_FLAG_COMPOSITE_SPACE_IMMUTABLE |
                             GIMP_LAYER_MODE_FLAG_COMPOSITE_MODE_IMMUTABLE  |
                             GIMP_LAYER_MODE_FLAG_SUBTRACTIVE,
-    .context              = GIMP_LAYER_MODE_CONTEXT_ALL,
+    .context              = GIMP_LAYER_MODE_CONTEXT_PAINT |
+                            GIMP_LAYER_MODE_CONTEXT_FADE,
     .paint_composite_mode = GIMP_LAYER_COMPOSITE_SRC_ATOP,
     .composite_mode       = GIMP_LAYER_COMPOSITE_SRC_ATOP,
     .composite_space      = GIMP_LAYER_COLOR_SPACE_RGB_PERCEPTUAL,