Annualized quote change column

[OnkelDok]

Hey, finally I found time to do a fresh installation of the development (because with installed one I get build errors). So here a first change proposal:

Sometimes for a security I want see and compare the annualized quote change. Especially when looking at higher intervals (>1 year), then with an annualized value it's easier to get an idea of the yearly increase, which is normally a good indicator for financial products.

So here a first sample as draft. If @buchen generally accepts this new column then I would continue the work (translations etc.).

Suggestions for (better) naming of the column (label, header, description) are welcome.

[OnkelDok]

@buchen: I don't know if you noticed this draft PR. Please give a short feedback (thumbs up or down) if these kind of columns would find a way into the software or not. If yes, then I will continue and finish the work on this PR.
Thanks in advance!

[OnkelDok]

I've now added labels and translations.
According to the label of the annualized TTWROR column (TTWROR p.a. 2 Jahre) I used the same format (Δ p.a. 2 Jahre).
If the format like in my initial screenshot is better (Δ 2 Jahre (p.a.)), then I can change this.

@buchen If you want see more reuse of code, then maybe we can create a class for the price change columns (normal an annualized) because a lot of code lines are the same. Only the final calculation and the labels and column ident is different.