DOC: Highlight lowpass filter recommendation in find_bad_channels_maxwell() (#7621)
DOC: Highlight lowpass filter recommendation in find_bad_channels_maxwell() (#7621)

* DOC: Highlight lowpass filter recommendation

* Move Note box farther up
pravsripad/mne-python,Eric89GXL/mne-python,wmvanvliet/mne-python,pravsripad/mne-python,olafhauk/mne-python,mne-tools/mne-python,pravsripad/mne-python,cjayb/mne-python,larsoner/mne-python,bloyl/mne-python,cjayb/mne-python,bloyl/mne-python,Teekuningas/mne-python,kingjr/mne-python,kingjr/mne-python,mne-tools/mne-python,kambysese/mne-python,rkmaddox/mne-python,olafhauk/mne-python,drammock/mne-python,Teekuningas/mne-python,larsoner/mne-python,drammock/mne-python,mne-tools/mne-python,wmvanvliet/mne-python,rkmaddox/mne-python,Teekuningas/mne-python,larsoner/mne-python,wmvanvliet/mne-python,kambysese/mne-python,drammock/mne-python,olafhauk/mne-python,kingjr/mne-python,Eric89GXL/mne-python