use .alert in fatal loading error UI to draw more attention (3320acc)

https://i.imgur.com/5ZukO0b.png
we probably will need to use 1 method for both error UIs at some point 😅

src/blenderbim/blenderbim/__init__.py

@@ -123,6 +123,7 @@ if sys.modules.get("bpy", None):
                 info = get_debug_info()
 
                 layout = self.layout
+                layout.alert = True
                 layout.label(text="BlenderBIM could not load.", icon="ERROR")
                 if info["os"] == "Windows":
                     layout.operator("wm.console_toggle", text="View the console for full logs.", icon="CONSOLE")