vulnerability: managed edit buttons
vulnerability: fix lognormal curve discretization for NRML export
vulnerability: func_distr_shape manage correctly for fragility curves
Merge remote-tracking branch 'origin/master' into fix-vuln-discr-btns
vulnerability: fix a template comment and a list comprehension refactored
Merge pull request #239 from gem/fix-vuln-discr-btns

Fix vuln discr btns