Meggie

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- Fix bugs

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- Fix evoked topomap title bug
- Implement group average for psd's and tfr's
- Fix defaults for tfr and psd creation
- Don't exclude bads when creating epochs
- Fix epoch overwrite bug
- Separate creation, plotting and saving of TFR's and spectrums
- Spectrums to their own tab
- Refactor codebase

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- Add plot evoked topomaps
- Add output options for spectrums
- Remove evoked stats dialog
- Add throbbers
- Add subject list sorting
- Update power spectrum dialog default values
- Fix evoked batch ui initialization bug

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- Fix ICA

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- Add throbbers

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- Refactor code
- Update throbbers
- Clean up messages