Is your feature request related to a problem? Please describe.
So I just noticed that currently there is one railway sign model style, which is based on the existing version first used in Tung Chung Line. However, I just found that there is also another two common railway sign version used in other MTR station:

One version is using in all pre-1990 stations (includes stations in Tsuen Wan Line, Kwun Tong Line (except 2002 and 2016 expansion stations) and Island Line (except 2015 expansion stations)

Another version is using in all new stations since 2014

Describe the solution you'd like
Based on this, I'm not sure if OK, in the future updates will we can a railway sign style selector in the page that we choose what icons shows on it?🤔

Additional Information
No, all information provided above.

Duplicate of #563