MNT: Warn about insufficient version for qt-backend for Epochs and ICA (#10325)
MNT: Warn about insufficient version for qt-backend for Epochs and ICA (#10325)

* warn about low mne-qt-browser version

* fix typo

* fix logic

* broader installation instructions
Eric89GXL/mne-python,mne-tools/mne-python,olafhauk/mne-python,larsoner/mne-python,pravsripad/mne-python,Teekuningas/mne-python,larsoner/mne-python,mne-tools/mne-python,drammock/mne-python,Teekuningas/mne-python,kingjr/mne-python,olafhauk/mne-python,wmvanvliet/mne-python,pravsripad/mne-python,drammock/mne-python,kingjr/mne-python,mne-tools/mne-python,Eric89GXL/mne-python,pravsripad/mne-python,Teekuningas/mne-python,wmvanvliet/mne-python,drammock/mne-python,olafhauk/mne-python,wmvanvliet/mne-python,kingjr/mne-python,larsoner/mne-python