Extend Peak Indicator Reset Options

Nobody has claimed this yet.

### Enhancement Summary

Usually my projects end up with many mixer channels (over 8 usually), and I find myself manually clicking the Peak Indicator on all the channels after some plugin causes temporary clipping. Now, all of the peak indicators indicate a 10.0 or something that is well above the regular level of a song, and I have to manually click every single peak indicator. I propose that we add a context menu to the peak indicators, so that when right-clicked, additional reset options show up. Keeping the current left click behavior would be fine, as long as we put a tooltip in the bottom left informing users of this (similar to the one that appears when dragging a MIDI clip in the Song Editor).

Also, I don't know what term we should use in the context menu completely. For now, I made a mockup with the word "sender", but this doesn't seem very intuitive. If anyone has a better idea as to what channels sending to the selected channel should be called, please feel free to improve upon this.

### Implementation Details / Mockup

Here I have a rough sketch of what would be in the context menu

(Note: To reset all peak indicators, one can just reset senders recursively on the master channel. I am well aware that any completely unlinked channels will not be affected by this, but I don't think that should matter, as you wouldn't be able to hear that channel normally either)

**IMPLEMENTATION**

To implement this, it should be fairly straightforward. ~~Two new methods, `void reset_senders` & `void reset_senders_recursive` in `MixerChannelView` can be implemented. Because `MixerChannel::m_recieves` is `public` and `MixerChannelView` is where the current click-to-reset function in implemented, it can be added in `MixerChannelView.cpp`~~. One thing that I'm not entirely sure on is how to distinguish between a right click on the actual channel as opposed to the tiny `PeakIndicator`, tho I believe we can add more code in `‎‎PeakIndicator::mousePressEvent` to distinguish between the left clicks and right clicks, but this might make routing back to the (I'm not a GUI guy). One thing that might need to be done, though, is making the peak indicator bigger, because it might be difficult to right-click in such a small area.

(EDIT: I believe I am mistaken as to how the current reset system works. I confused `MixerChannelView::reset` with `‎PeakIndicator::resetPeakToMinusInf`, so implementation might be a little more confusing that I believed it be.)

### Please search the issue tracker for existing feature requests before submitting your own.

- [x] I have searched all existing issues and confirmed that this is not a duplicate.

Start by reading MixerChannelView.cpp, MixerChannel, and PeakIndicator::mousePressEvent to verify how the current peak reset works and how mouse events are routed. Determine how the proposed context-menu reset options should cover related senders and recursive senders, while preserving left-click reset behavior and providing the requested tooltip; confirm the interaction manually in the mixer.

Written by the indexing model from the issue text.