[evolution] Bug 785717 - Add plain minus key to collapse thread

[Milan Crha <mcrha src gnome org>]

commit 2c4487e1073f133dc45fc36426c02d8445811638
Author: Milan Crha <mcrha redhat com>
Date:   Thu Aug 3 13:58:15 2017 +0200

    Bug 785717 - Add plain minus key to collapse thread

 src/e-util/e-tree.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/e-util/e-tree.c b/src/e-util/e-tree.c
index 3838932..ccb8aec 100644
--- a/src/e-util/e-tree.c
+++ b/src/e-util/e-tree.c
@@ -1053,6 +1053,7 @@ item_key_press (ETableItem *eti,
                }
                return_val = 1;
                break;
+       case GDK_KEY_minus:
        case GDK_KEY_underscore:
        case GDK_KEY_KP_Subtract:
        case GDK_KEY_Left: