eeschema wires and buses should have editing handles

[Dino Ghilardi]

wish: having consistent behaviour between wire, bus and graphic lines.

If you select a segment of a graphic line, the two control points (black squares) are shown at the end of the segment and dragging one of them let you move the vertex keeping the line connected with other segments (if it is a vertex of a polyline). This is good (and useful)

If you select a segment of a wire, no control points are shown and is not possible to move the vertex.
The same applies to buses.

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Checked on commit c52ff1ca23143b9ab7406bfb1e87927bdba466fb
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Version info:

Application: Eeschema
Version: (5.1.0-671-gc52ff1ca2), debug build
Libraries:
    wxWidgets 3.0.2
    libcurl/7.52.1 OpenSSL/1.0.2r zlib/1.2.8 libidn2/0.16 libpsl/0.17.0 (+libidn2/0.16) libssh2/1.7.0 nghttp2/1.18.1 librtmp/2.3
Platform: Linux 4.9.0-8-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: 1.69.0
    OpenCASCADE Community Edition: 6.8.0
    Curl: 7.52.1
    Compiler: GCC 6.3.0 with C++ ABI 1010

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_PYTHON3=OFF
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_WXPYTHON_PHOENIX=OFF
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_USE_OCC=OFF
    KICAD_SPICE=ON

[Michael Kavanagh (michaelkavanagh)]

If this is implemented, dragging vertices should maintain orthogonality of wires by default. Being able to drag the middle of wires would also be useful.

https://www.altium.com/documentation/18.0/display/ADES/Sch_Obj-Wire((Wire))_AD#!Wire-GraphicalEditing

[KiCad Janitor (kicad-janitor)]

KiCad bug tracker has moved to Gitlab. This report is now available here: https://gitlab.com/kicad/code/kicad/-/issues/2432