fix(slide-gesture): RTL fix for slide-gesture

[sijav]

Short description of what this resolves:

RTL fix for slide-gesture, this will resolve any problem with drag from right to left such as swipe to back, items slider, etc.

Changes proposed in this pull request:

• slide position minus new position instead of new position minus slide position

Ionic Version: 3.x

Fixes: #11211

[sijav]

this commit has a bug on pages with menu, I'll check and fix it.
however this will fix item-sliding directions on touch too

[AmitMY]

@sijav Note that master's menu is buggy, so it might not be your fault.
I have been working on a fix for some time now, but it is not yet perfect, and I am not sure how to perfect it.
Mind having a look? #11336

[sijav]

@AmitMY yes I realize now that it's not my fault but I'm working on it.
I think I know why menu is buggy ...

[sijav]

Menu has been fixed and after this merge and menu fix merge there won't be any bug that I could be aware of.
So if you saw any, just let me know.

[brandyscarney]

Thank you! 🙂

[sijav]

@brandyscarney now that this got merge would you mind check these as well?
#11825 for item sliding
#11830 for menu
Without these item sliding and menu have bugs and won't function correctly
Thank you :)