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

These end up overriding the panning shortcuts for the image view,
preventing using the arrow keys when zoomed in.

Scrolling in the browser/thumbnail view still works with the arrow
keys because they're baked into the GthGridView class.

Fixes #183.

Author: mtwebster

pix/gth-browser-actions-entries.h

@@ -124,14 +124,10 @@ 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" },