Operators name "cleanup"

The operator names all show up in the Search button. As such is nicer if they
can all have the main words capitalized.

e.g. "Snap strips" should be "Snap Strips"
     "Copy to clipboard" should be "Copy to Clipboard"

This was done with a mix of bash tools, regex, and manual work because I'm too rushed into regex :)

+ fix bge stereo eye separation tooltip

source/blender/editors/mesh/mesh_navmesh.c

@@ -478,7 +478,7 @@ static int navmesh_create_exec(bContext *C, wmOperator *op)
 void MESH_OT_navmesh_make(wmOperatorType *ot)
 {
 	/* identifiers */
-	ot->name = "Create navigation mesh";
+	ot->name = "Create Navigation Mesh";
 	ot->description = "Create navigation mesh for selected objects";
 	ot->idname = "MESH_OT_navmesh_make";