add link to Language arrangements in the help menu

[Strubbl]

Please add a link to the help menu for the Language arrangements - Glossary https://framacalc.org/WN_DEnglisch

i mean this help menu:

this way we have a nice shortcut to the glossary without searching the wiki or maintaining a personal bookmark

[fredao]

add two other links

• https://framacalc.org/weekly_categories
• https://osmbc.openstreetmap.de/osmww/wiki/we-reported-earlier