Revert "gth-browser-actions-entries.h: Remove left/right/up/down shortcuts."

This reverts commit 7a03386.

These are needed in picture/video view to go to the next/previous
file.

Author: clefebvre

pix/gth-browser-actions-entries.h

@@ -124,10 +124,14 @@ static const GthShortcut gth_browser_shortcuts[] = {
 	{ "sort-by", N_("Change sorting order"), GTH_SHORTCUT_CONTEXT_BROWSER, GTH_SHORTCUT_CATEGORY_NAVIGATION, "s" },
 
 	{ "show-previous-image", N_("Show previous file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "Page_Up" },
+	{ "show-previous-image", N_("Show previous file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "Left" },
 	{ "show-previous-image", N_("Show previous file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "KP_Left" },
+	{ "show-previous-image", N_("Show previous file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "Up" },
 	{ "show-previous-image", N_("Show previous file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "KP_Up" },
 	{ "show-next-image", N_("Show next file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "Page_Down" },
+	{ "show-next-image", N_("Show next file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "Right" },
 	{ "show-next-image", N_("Show next file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "KP_Right" },
+	{ "show-next-image", N_("Show next file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "Down" },
 	{ "show-next-image", N_("Show next file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "KP_Down" },
 	{ "show-first-image", N_("Show first file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "Home" },
 	{ "show-last-image", N_("Show last file"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_VIEWER, "End" },