Allow layout options configuration from run control

spec/uh/wm/run_control_spec.rb

@@ -87,10 +87,19 @@ module Uh
 
       describe '#layout' do
         context 'when given a class' do
+          let(:layout_class) { Class.new }
+
           it 'sets a layout class in the env' do
-            rc.layout layout_class = Class.new
+            rc.layout layout_class
             expect(env.layout_class).to be layout_class
           end
+
+          context 'when given options' do
+            it 'instantiates the class with given options' do
+              expect(layout_class).to receive(:new).with(foo: :bar)
+              rc.layout layout_class, foo: :bar
+            end
+          end
         end
 
         context 'when given an object' do