[gnome-books] evinceview: Add more zoom in/out keyboard shortcuts

[Bastien Nocera <hadess src gnome org>]

commit 4ff802714364321fb9a02938d238aedccb3b9594
Author: Bastien Nocera <hadess hadess net>
Date:   Sat Aug 3 17:56:39 2019 +0200

    evinceview: Add more zoom in/out keyboard shortcuts
    
    As used in the epub view.

 src/evinceview.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/evinceview.js b/src/evinceview.js
index 8f61123e..0d0ab33a 100644
--- a/src/evinceview.js
+++ b/src/evinceview.js
@@ -138,10 +138,10 @@ var EvinceView = new Lang.Class({
         let actions = [
             { name: 'zoom-in',
               callback: Lang.bind(this, this._zoomIn),
-              accels: ['<Primary>plus', '<Primary>equal'] },
+              accels: ['<Primary>plus', '<Primary>equal', '<Primary>KP_Add'] },
             { name: 'zoom-out',
               callback: Lang.bind(this, this._zoomOut),
-              accels: ['<Primary>minus'] },
+              accels: ['<Primary>minus', '<Primary>KP_Subtract'] },
             { name: 'copy',
               callback: Lang.bind(this, this._copy),
               accels: ['<Primary>c'] },