draw line tool does not update default line-width on layer change

[Thomas Pointhuber]

# HowTo Reproduce

https://cloud.oe5tpo.com/s/5YLX8wr2Zc7FB2s

1. start line tool
2. draw line, stop drawing but do not exit tool
3. change layer to something with different default line width (Configured in Board Setup)
4. draw line

You will notice the line width of the first line will be used, and not the one specified for the actual layer.

# Version Information

Application: pcbnew
Version: (6.0.0-rc1-dev-696-g8c56f5b03), debug build
Libraries:
    wxWidgets 3.1.1
    libcurl/7.61.1 OpenSSL/1.1.1 zlib/1.2.11 libidn2/2.0.5 libpsl/0.20.2 (+libidn2/2.0.4) libssh2/1.8.0 nghttp2/1.33.0
Platform: Linux 4.18.12-arch1-1-ARCH x86_64, 64 bit, Little endian, wxGTK
Build Info:
    wxWidgets: 3.1.1 (wchar_t,wx containers) GTK+ 2.24
    Boost: 1.68.0
    OpenCASCADE Community Edition: 6.9.1
    Curl: 7.61.1
    Compiler: Clang 7.0.0 with C++ ABI 1002

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_WXPYTHON=OFF
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_USE_OCC=OFF
    KICAD_SPICE=ON

[KiCad Janitor (kicad-janitor)]

Fixed in revision 1ee579c82100ae203b264b4ad87b9450b7f35fa6
https://git.launchpad.net/kicad/patch/?id=1ee579c82100ae203b264b4ad87b9450b7f35fa6