changelog: fix display artifacts in expanded multi-line commit messages When a multi-line commit message is expanded in a changelog, and the last line of the commit message has some characters that go below the baseline, like an underscore, g, j, y, ... the bottom part of these characters would not be shown. This is caused by the 'overflow: hidden' property set on the unexpanded message. Reset that property by adding 'overflow: initial' on the expanded class. Additionally, slightly enlarge the margin of the expanded message box.