removing "serve-static" from direct dependencies as it is already part
of the standard express module

IMPORTANT: you need to refresh the express module. Easiest is to delete
folder in node_modules and do a fresh npm install
simplification in the way lodash is used
hiding not translated parts from English viewers on title page
fixing #802
Merge pull request #803 from leider/special

fixing #802
make the tooltip in calendar a bit narrower
Merge pull request #804 from leider/special

make the tooltip in calendar a bit narrower
Merge commit '77a9cb50cc6822ab24726e0e17573bd69a91a07b'
Fixing Mailarchive display in Dashboard
messages can now be displayed in separate page
tooltip now 130 instead of 120px - fixing #805
Merge pull request #801 from leider/master

removing "serve-static" from direct dependencies as it is already part
Merge commit 'a42dca14f3eeabc0b2d6dc4e3cf48ae25fcaeb61'
Merge pull request #806 from leider/master

seperate page for mail messages display
Add ability to delete Activities for superusers and owners
forgot an unused variable
forgot english translation
Merge pull request #808 from leider/master

Add ability to delete Activities for superusers and owners
preparing this year's gdcr
Merge pull request #809 from leider/master

preparing this year's gdcr