Sidebar: fix some typos in function naming.

Mostly found by:	Noel Grandin
Reviewed by:		Andre Fischer

(cherry picked from commit 1ad216c0b831fc10ff4e73392dbcc9832463a7bc)

Conflicts:
	svx/source/sidebar/line/LineWidthControl.cxx
	svx/source/sidebar/line/LineWidthControl.hxx

Change-Id: I662a262d2cd920b54338c16bf688181b95e2f863