Furthermore, when adding the new help icon, please make sure it is correctly aligned to the page and does not stand further to the right than the elements of the menu bar above

Background:
The revisionSlider is a feature that adds a visualization of all revisions to the compare screen. Revisions are represented as bars on a line and can be selected using two pointers. The revisionSlider was originally prototyped by the WMF Community Tech team and then handed over to the WMDE TCB team, as it is a solution to fulfill a wish of the German Community Wishlist:

English link: https://meta.wikimedia.org/wiki/WMDE_Technical_Wishes
German link: https://de.wikipedia.org/wiki/Wikipedia:Umfragen/Technische_W%C3%BCnsche_2015/Artikel#Anzeige_aller_Bearbeitungskommentare_im_Diff or in