pcbnew: Filled zone tool doesn't know when you change layers

[Seth Hillbrand]

Start pcbnew
Select F.Cu layer
Start the filled zone tool
Click on the canvas -> you see the copper zone dialog
Cancel the dialog
Change the layer to F.Silk
Click on the canvas -> you still see the copper zone dialog
Cancel the dialog and cancel the filled zone tool
Restart the filled zone tool
Click on the canvas -> now you see the non-copper zone dialog for F.Silk

Expected behavior:
pcbnew zone tool should show the dialog based on the current layer when starting a new zone

Application: kicad
Version: (6.0.0-rc1-dev-879-g4f672f0d3-dirty), release build
Libraries:
    wxWidgets 3.0.2
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: 1.62.0
    OpenCASCADE Community Edition: 6.8.0
    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_WXPYTHON=ON
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=OFF
    KICAD_USE_OCE=ON
    KICAD_USE_OCC=OFF
    KICAD_SPICE=ON

[Jeff Young (jeyjey)]

I fixed this as part of https://bugs.launchpad.net/kicad/+bug/1797481.

(He he... just noticed that one was also reported by Seth.)

[Seth Hillbrand (sethh)]

Thanks Jeff!