Allow cursor to have 45 or arbitrary degree

[Jakub Kozdon]

Can you add an option to have cursor at 45° or arbitrary degree with an option to have visible 0/90°? It will be usable for aligning components.

Application: kicad
Version: (2017-11-09 revision 87d06e5)-HEAD, release build
Libraries:
    wxWidgets 3.0.2
    libcurl/7.38.0 OpenSSL/1.0.1t zlib/1.2.8 libidn/1.29 libssh2/1.4.3 librtmp/2.3
Platform: Linux 3.16.0-4-amd64 x86_64, 64 bit, Little endian, wxGTK
Build Info:
    wxWidgets: 3.0.2 (wchar_t,wx containers,compatible with 2.8) GTK+ 2.24
    Boost: 1.55.0
    Curl: 7.38.0
    Compiler: GCC 4.9.2 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=ON
    KICAD_SCRIPTING_ACTION_MENU=OFF
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=OFF
    KICAD_SPICE=OFF

[KiCad Janitor (kicad-janitor)]

KiCad bug tracker has moved to Gitlab. This report is now available here: https://gitlab.com/kicad/code/kicad/-/issues/2085