[nautilus] Adwaita.css: make disclosure-button styles specific

[António Fernandes <antoniof src gnome org>]

commit 1f17458c624023ce96136a2c0f97a26d71390288
Author: Tomasz Gąsior <kontakt tomaszgasior pl>
Date:   Sat Jun 15 20:06:58 2019 +0200

    Adwaita.css: make disclosure-button styles specific
    
    Original intention was to make disclosure button narrow.
    Override horizontal paddings only and inherit vertical
    paddings from parent stylesheet for simpler maintenance.

 src/resources/css/Adwaita.css | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/resources/css/Adwaita.css b/src/resources/css/Adwaita.css
index 11df2291a..e4126a1d1 100644
--- a/src/resources/css/Adwaita.css
+++ b/src/resources/css/Adwaita.css
@@ -39,7 +39,8 @@
 }
 
 .disclosure-button {
-  padding: 4px;
+  padding-left: 4px;
+  padding-right: 4px;
 }
 
 /* Path bar */