Add "Basic" and "Options" tabs for Mesh Edit Mode.

This creates the initial two tabs for Edit Mode to makes the new toolbar tabs usable. Further toolbar organization is to follow, but this at least makes the features work with the current organization.

release/scripts/startup/bl_ui/space_view3d_toolbar.py

@@ -289,6 +289,7 @@ class VIEW3D_PT_tools_add_mesh_edit(View3DPanel, Panel):
         col.operator("mesh.primitive_monkey_add", text="Monkey", icon="MESH_MONKEY")
 
 class VIEW3D_PT_tools_meshedit(View3DPanel, Panel):
+    bl_category = "Basic"
     bl_context = "mesh_edit"
     bl_label = "Mesh Tools"
 
@@ -363,6 +364,7 @@ class VIEW3D_PT_tools_meshedit(View3DPanel, Panel):
 
 
 class VIEW3D_PT_tools_meshedit_options(View3DPanel, Panel):
+    bl_category = "Options"
     bl_context = "mesh_edit"
     bl_label = "Mesh Options"