themes: upgrade our themes

Origin commit data
------------------
Commit: d8c2b9be66
Author: vanhofen <vanhofen@gmx.de>
Date: 2019-04-02 (Tue, 02 Apr 2019)

Origin message was:
------------------
- themes: upgrade our themes

data/themes/AdulteratedOrange.theme

@@ -73,6 +73,8 @@ menu_Head_red=0
 menu_Hint_gradient=4
 menu_Hint_gradient_direction=1
 menu_Separator_gradient_enable=0
+menu_SubHead_gradient=4
+menu_SubHead_gradient_direction=1
 rounded_corners=0
 progressbar_active_blue=0
 progressbar_active_green=70

data/themes/Material_Blue-Grey.theme

@@ -10,6 +10,9 @@ menu_Head_alpha=10
 menu_Head_gradient=0
 menu_Head_gradient_direction=1
 
+menu_SubHead_gradient=0
+menu_SubHead_gradient_direction=1
+
 # 500
 menu_Content_red=38
 menu_Content_green=49

data/themes/Material_Grey_(Dark).theme

@@ -10,6 +10,9 @@ menu_Head_alpha=10
 menu_Head_gradient=0
 menu_Head_gradient_direction=1
 
+menu_SubHead_gradient=0
+menu_SubHead_gradient_direction=1
+
 # 900
 menu_Content_red=13
 menu_Content_green=13

data/themes/Material_Grey_(Dark)_Orange.theme

@@ -10,6 +10,9 @@ menu_Head_alpha=10
 menu_Head_gradient=0
 menu_Head_gradient_direction=1
 
+menu_SubHead_gradient=0
+menu_SubHead_gradient_direction=1
+
 # 900
 menu_Content_red=13
 menu_Content_green=13

data/themes/Material_Grey_(Light).theme

@@ -10,6 +10,9 @@ menu_Head_alpha=10
 menu_Head_gradient=0
 menu_Head_gradient_direction=1
 
+menu_SubHead_gradient=0
+menu_SubHead_gradient_direction=1
+
 # 600
 menu_Content_red=46
 menu_Content_green=46

data/themes/Material_Grey_(Medium).theme

@@ -10,6 +10,9 @@ menu_Head_alpha=10
 menu_Head_gradient=0
 menu_Head_gradient_direction=1
 
+menu_SubHead_gradient=0
+menu_SubHead_gradient_direction=1
+
 # 800
 menu_Content_red=26
 menu_Content_green=26