Update annotations: back_handler and blocker

druid/base/static_grid.lua

@@ -1,6 +1,8 @@
 --- Component to handle placing components by row and columns.
 -- Grid can anchor your elements, get content size and other
 -- @module druid.static_grid
+-- @within BaseComponent
+-- @alias druid.static_grid
 
 --- Component events
 -- @table Events