Eevee: Add dimension panel to eevee

Up until now users had to switch to Blender Internal to set the dimension of their openGl renderings. This simple change adds the panel at the top of the scene render tab.

release/scripts/startup/bl_ui/properties_render.py

@@ -79,7 +79,7 @@ class RENDER_PT_render(RenderButtonsPanel, Panel):
 
 class RENDER_PT_dimensions(RenderButtonsPanel, Panel):
     bl_label = "Dimensions"
-    COMPAT_ENGINES = {'BLENDER_RENDER'}
+    COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_EEVEE'}
 
     _frame_rate_args_prev = None
     _preset_class = None