Sculpting: Move lock options in symmetry panel.

Lock is an often used option according to artist feedback, so better
have it on the same tab as brush tools.
Usual UI messages fixes...
Paint: Descrollification commit for brush texture angle property.

Original patch by Sebastian Koenig with edits.
Fix T38525: missing update when running bpy.ops.transform.* from the console.
Add header info for the Fly Navigation operator