Added core.set_active_view(); removed focusable boolean from View

data/core/init.lua

@@ -100,7 +100,6 @@ function core.init()
 
   core.root_view.root_node:split("down", core.command_view, true)
   core.root_view.root_node.b:split("down", core.status_view, true)
-  core.active_view = core.root_view.root_node.a.active_view
 
   core.add_thread(project_scan_thread)
   command.add_defaults()
@@ -192,6 +191,15 @@ function core.reload_module(name)
 end
 
 
+function core.set_active_view(view)
+  assert(view, "Tried to set active view to nil")
+  if view ~= core.active_view then
+    core.last_active_view = core.active_view
+    core.active_view = view
+  end
+end
+
+
 function core.add_thread(f, weak_ref)
   local key = weak_ref or #core.threads + 1
   local fn = function() return core.try(f) end