Fix background color use in 3D view

TH_BACK was being used when drawing the 3D view even though
there was no way to set the color in the preferences.

The color was zero'd when moving to the new 2.8x theme.

Having both gradient and background colors was confusing,
especially having to use 'TH_HIGH_GRAD' for the 3D view, 'TH_BACK' for
other views.

Move the background color back to 'TH_BACK', 'TH_BACK_GRAD' is used
when gradients are enabled.
RNA is unchanged so presets don't need updating.

1 files changed, 12 insertions, 4 deletions

diff --git a/source/blender/blenloader/intern/versioning_userdef.c b/source/blender/blenloader/intern/versioning_userdef.c
index 4fed46170a9..3143c5069e6 100644
--- a/source/blender/blenloader/intern/versioning_userdef.c
+++ b/source/blender/blenloader/intern/versioning_userdef.c
@@ -108,6 +108,10 @@ static void do_versions_theme(UserDef *userdef, bTheme *btheme)
 		copy_v4_v4_char(btheme->tuserpref.execution_buts, btheme->tuserpref.navigation_bar);
 	}
 
+	if (!USER_VERSION_ATLEAST(280, 41)) {
+		copy_v4_v4_char(btheme->tv3d.back, U_theme_default.tv3d.back);
+	}
+
 #undef USER_VERSION_ATLEAST
 }
 
@@ -465,10 +469,7 @@ void BLO_version_defaults_userpref_blend(Main *bmain, UserDef *userdef)
 		        USER_UIFLAG_DEPRECATED_22);
 	}
 
-	/**
-	 * Include next version bump.
-	 */
-	{
+	if (!USER_VERSION_ATLEAST(280, 41)) {
 		/* (keep this block even if it becomes empty). */
 
 		if (userdef->pie_tap_timeout == 0) {
@@ -476,6 +477,13 @@ void BLO_version_defaults_userpref_blend(Main *bmain, UserDef *userdef)
 		}
 	}
 
+	/**
+	 * Include next version bump.
+	 */
+	{
+		/* (keep this block even if it becomes empty). */
+	}
+
 	if (userdef->pixelsize == 0.0f)
 		userdef->pixelsize = 1.0f;