fix touch support

[dmg-hamann]

What changed?

Added the code @KKauK suggested in #418 and enhanced Showcase to test touch. I was able to test on a touch panel and after the adjustments it works fine.

Closes #418

[jizc]

I'm sure this was unintentional, but your PR reverts the changes from #426 and #430. You may want to rebase.

[dmg-hamann]

Oh Im sorry. I'll fix that.

[dmg-hamann]

I made the mistake to use the files mentioned in the issue which were based on an older commit and I replaced the whole content. I merged the code

[las-nsc]

@dmg-hamann @punker76, any chance of getting this in? It's making our solution unusable.

[punker76]

@las-nsc I am still on holiday. Next week I can have a look at this.

[John-Welch]

(@las-nsc's colleague here)
@punker76 Do you have a rough idea when this might be merged and pushed into NuGet? We'd much prefer to pick up an updated package from there than have to fork the repo and apply the PR locally to get the fix for our solution.

[punker76]

@dmg-hamann your changes have been merged, thanks for your contribution 👍

[John-Welch]

Thanks very much for the fix - I've upgraded to 3.2.0 using NuGet and the propblem has gone away.