schedule's background fill driven by .ods/xlsx, if it exists.

also added `.border` class to default schedule css.

src/blenderbim/blenderbim/bim/data/assets/schedule.css

@@ -43,3 +43,9 @@
 }
 
 text, tspan { /* 2.5mm */ fill: black; stroke: none; font-family: 'OpenGost Type B TT', 'DejaVu Sans Condensed', 'Liberation Sans', 'Arial Narrow', 'Arial'; }
+
+.border {
+    stroke: #000000;
+    stroke-width:.125;
+    fill: none; /* will be overriden if background color is set in .ods, or .xlsx */
+}

src/blenderbim/blenderbim/bim/module/drawing/scheduler.py

@@ -159,6 +159,7 @@ class Scheduler:
                     self.svg.rect(
                         insert=(x, y),
                         size=(width, height),
+                        style=f"fill: {background_color};",
                         class_="border",
                     )
                 )
@@ -435,6 +436,7 @@ class Scheduler:
                             self.svg.rect(
                                 insert=(x, y),
                                 size=(width, height),
+                                style=f"fill: {background_color};",
                                 class_="border",
                             )
                         )