hgview #99402 crash on added file with python 2.7 [validation pending]

HgView crash With python2.7 while displaying an added file
(seems caused by the lazy import feature of mercurial)

priorityimportant
typebug
done in1.6.0
load0.100
load left0.000
closed by#51dc48d57f07 [lib] fix: do not lazy import missing modules (closes #99402)