Don't reset MCParticle tree filters between events

[Zehvogel]

I usually want to look at multiple events with the same filter settings and if I really want to reset we already have a button for that :)

[Zehvogel]

This is actually so annoying that I came here again to open an issue for this and found my old one :(

[brauliorivas]

Oh, I'm sorry @Zehvogel. I'll take this into account and plan to do it ASAP (I hope in max 2 weeks to have this).