Added keybind to download images in gallery viewer

src/Images/Gallery.coffee

@@ -254,6 +254,8 @@ Gallery =
           Gallery.cb.rotateLeft
         when Conf['Rotate image clockwise']
           Gallery.cb.rotateRight
+        when Conf['Download Gallery Image']
+          Gallery.cb.download
 
       return unless cb
       e.stopPropagation()
@@ -288,6 +290,10 @@ Gallery =
     blank: (e) -> Gallery.cb.close() if e.target is @
     toggleSlideshow: ->  Gallery.cb[if Gallery.slideshow then 'stop' else 'start']()
 
+    download: ->
+      name = $ '.gal-name'
+      name.click()
+
     pause: ->
       Gallery.cb.stop()
       {current} = Gallery.nodes

src/config/Config.coffee

@@ -1016,6 +1016,10 @@ Config =
       'Shift+Left'
       'Rotate image anticlockwise in gallery.'
     ]
+    'Download Gallery Image': [
+      'Shift+j'
+      'Download current image in gallery.'
+    ]
     'fappeTyme': [
       'f'
       'Toggle Fappe Tyme.'