The feature list in the help modal used the generic .help-text class. An
externally injected global .help-text rule (e.g. from a browser extension)
sets position: fixed and z-index: 10000, which pulled the list out of flow
and covered the modal tab buttons: the app's own rule never declared
position, so the injected declaration applied.
Rename the class to .help-features and scope its rules under .help-modal
so third-party global styles can no longer match it. Also close the
unterminated <a>/<li> pair in the documentation tab.
Will Miao
87f2ed634e