Update Plant UML Viewer to 1.4.0.8

[Fruchtzwerg94]

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[chcg]

@Fruchtzwerg94 To get back a clean master before next update:

# ensures current branch is master
git checkout master

# pulls all new commits made to upstream/master
git pull upstream master

# this will delete all your local changes to master
git reset --hard upstream/master

# take care, this will delete all your changes on your forked master
git push origin master --force

from e.g. https://stackoverflow.com/questions/42332769/how-do-i-reset-the-git-master-branch-to-the-upstream-branch-in-a-forked-reposito