[pitivi] ui: Make separators thinner and darker

[Alexandru Băluț <alexbalut src gnome org>]

commit ebe8db3e4be6d155b7cbedf41db050186d9760dc
Author: Diego Garcia Gangl <dnicolas gmail com>
Date:   Fri Apr 26 20:54:20 2019 -0300

    ui: Make separators thinner and darker

 pitivi/utils/ui.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/pitivi/utils/ui.py b/pitivi/utils/ui.py
index d631a39f..faa3c9ff 100644
--- a/pitivi/utils/ui.py
+++ b/pitivi/utils/ui.py
@@ -58,7 +58,7 @@ SNAPBAR_WIDTH = 5
 SNAPBAR_COLOR = (127, 153, 204)
 LAYER_HEIGHT = 130
 # The space between two layers.
-SEPARATOR_HEIGHT = PADDING
+SEPARATOR_HEIGHT = 1
 
 SMALL_THUMB_WIDTH = 64
 # 128 is the normal size for thumbnails, but for *icons* it looks insane.
@@ -234,7 +234,7 @@ EDITOR_PERSPECTIVE_CSS = """
     }
 
     .SpacedSeparator {
-        background-color: rgba(0, 0, 0, 0.1);
+        background-color: rgba(0, 0, 0, 0.3);
     }
 
     .Marquee {