[nautilus] adwaita.css: Apply new style to path-bar DnD Targets

[Carlos Soriano <csoriano src gnome org>]

commit bb6f46ff3e49a2342f78c6732ebcae85ea07ee8e
Author: Timothy OBrien <obrien timothy a gmail com>
Date:   Sun Jan 13 23:53:51 2019 +1100

    adwaita.css: Apply new style to path-bar DnD Targets
    
    path-bar DnD targets were using the 'green border' style when targeted. This style is inconsistent with 
the 'solid bottom border' style of the other path-bar actions.
    This commit updates the target style to show a 'solid bottom border' in the theme's drop target color.
    Fixes #765

 src/resources/css/Adwaita.css | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/resources/css/Adwaita.css b/src/resources/css/Adwaita.css
index cde48e70f..dba165d25 100644
--- a/src/resources/css/Adwaita.css
+++ b/src/resources/css/Adwaita.css
@@ -55,6 +55,8 @@
 
 .nautilus-path-bar button:not(:backdrop):hover { box-shadow: inset 0 -3px @borders; }
 
+.nautilus-path-bar button:drop(active) { box-shadow: inset 0 -3px; }
+
 .path-bar-box {
   transition: border 200ms;
   transition: background-color 200ms;