Reflect style rules order also within a set of filtered rules

[jmacura]

Feature Request

Is your feature request related to a problem? Please describe.
When more rules are defined based on a filter on the same attribute, the order of rules is not reflected in the map.

Describe the solution you'd like
The order of rules in Styler panel corresponding with the order of rendering features in the map canvas.
In the screenshot, the small yellow dots shall be under the larger orange and red dots.

Describe alternatives you've considered
...

Additional context
spin-off from #4447
Also need to check if the order is stored in the SLD/QML/Geostyler somehow

[FilipLeitner]

I am afraid this will not be possible....at least not easily.
While openlayers allows to set zIndex on style, geostyler (for multiple rules )returns a styleFunction (not style obj or array of objs) which is called to construct a style for each feature. See mark symbolizer example here
And for zIndex there is no control.