This error is stilll happening for me, even though FL-5430 says it was fixed:
emerge: there are no ebuilds to satisfy "~x11-libs/qscintilla-2.10.8:=".
(dependency required by "dev-python/qscintilla-python-2.10.8::python-modules-kit" [ebuild])
(dependency required by "dev-vcs/tortoisehg-4.4.2::dev-kit" [installed])
(dependency required by "@selected" [set])
(dependency required by "@world" [argument])

qscintilla-python is still in python-modules-kit:
eix qscintilla-python
[U] dev-python/qscintilla-python [1]
Available versions: 2.10.4 ()2.10.7 ()2.10.8

{debug PYTHON_TARGETS="python2_7 python3_4 python3_5 python3_6 python3_7"}

Installed versions: 2.10.1[2](19:56:59 2018-05-02)(qt5 -debug -qt4 PYTHON_TARGETS="python2_7 python3_6 -python3_4 -python3_5")
[2] "python-kit" /var/git/meta-repo/kits/python-kit
[1] "python-modules-kit" /var/git/meta-repo/kits/python-modules-kit