Teardrop tool icons need work

Description

Steps to reproduce

They do not conform to the icon standards and should be fixed to look better

KiCad Version

Application: KiCad x86_64 on x86_64

Version: 7.99.0-3737-g619c9bb0e4-dirty, debug build

Libraries:
	wxWidgets 3.2.2
	FreeType 2.12.1
	HarfBuzz 6.0.0
	FontConfig 2.14.1

Platform: Debian GNU/Linux 12 (bookworm), 64 bit, Little endian, wxGTK, X11, lightdm-xsession, x11

	wxWidgets: 3.2.2 (wchar_t,wx containers) GTK+ 3.24
	Boost: 1.74.0
	OCC: 7.6.3
	Curl: 7.88.1
	ngspice: 39
	Compiler: GCC 12.2.0 with C++ ABI 1017

Build settings:
	KICAD_STDLIB_DEBUG=OFF
	KICAD_STDLIB_LIGHT_DEBUG=ON
	KICAD_SANITIZE_ADDRESS=OFF
	KICAD_SANITIZE_THREADS=OFF