RTL Support, Diagonal Ruler Guide, and Add Path Effect like inkscape

[Dedi Satria]

i hope affinity team add RTL Support, Diagonal Ruler Guide, and Add Path Effect like inkscape feature 

[Swiet]

Concerning the measuring tool, I would like to see the abbility to keep the measurements on a layer, so that we will have the option to have the measurements printed on the documents we produce.

[Distill7]

+ for RTL even though I know it'll take a long time to be implemented.