Rename any instance of scene layer or render layer in code with view layer

The RenderResult struct still has a listbase of RenderLayer, but that's ok
since this is strictly for rendering.

* Subversion bump (to 2.80.2)
* DNA low level doversion (renames) - only for .blend created since 2.80 started

Note: We can't use DNA_struct_elem_find or get file version in init_structDNA,
so we are manually iterating over the array of the SDNA elements instead.

Note 2: This doversion change with renames can be reverted in a few months. But
so far it's required for 2.8 files created between October 2016 and now.

Reviewers: campbellbarton, sergey

Differential Revision: https://developer.blender.org/D2927

release/scripts/startup/bl_ui/properties_data_workspace.py

@@ -54,7 +54,7 @@ class WORKSPACE_PT_workspace(WorkSpaceButtonsPanel, Panel):
 
         layout.enabled = not workspace.use_scene_settings
 
-        layout.template_search(workspace, "render_layer", scene, "render_layers")
+        layout.template_search(workspace, "view_layer", scene, "view_layers")
 
         if view_render.has_multiple_engines:
             layout.prop(view_render, "engine", text="")