Don't flash wxRTC caret if blink time is zero, and also take colour from window text colour to avoid invisibility.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@74358 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Use wxRTC text colour if possible for caret


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@74360 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Caret blink time and blink on/off are now also reflected in GTK+ widgets


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@74363 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775