installer: Update Inno Setup translations from upstream.

[ci skip]
FixDoubleDash Improved
FixEllipsesStartHelper Improved
Merge pull request #348 from ivandrofly/patch-0.2

FixDoubleDash Improved
Merge pull request #349 from ivandrofly/patch-0.3

FixEllipsesStartHelper Improved
nl-NL translation: minor corrections/improvements + new tags
nl-NL translation: spcorr + experiment (buttons)
nl-NL translation: preferences 1