Various fixes for 2d polygon editor
Various fixes for 2d polygon editor

Fixes issues 15096, 15097
Fixes various other Line2D edit issues
Fixes previous outline
Fixes retina support

groud/godot,Zylann/godot,guilhermefelipecgs/godot,Valentactive/godot,pkowal1982/godot,akien-mga/godot,groud/godot,DmitriySalnikov/godot,ZuBsPaCe/godot,MarianoGnu/godot,RandomShaper/godot,NateWardawg/godot,Zylann/godot,MarianoGnu/godot,okamstudio/godot,Paulloz/godot,mcanders/godot,sanikoyes/godot,RandomShaper/godot,vkbsb/godot,godotengine/godot,godotengine/godot,sanikoyes/godot,pkowal1982/godot,NateWardawg/godot,honix/godot,MarianoGnu/godot,vkbsb/godot,honix/godot,Valentactive/godot,Faless/godot,okamstudio/godot,guilhermefelipecgs/godot,pkowal1982/godot,Paulloz/godot,godotengine/godot,ZuBsPaCe/godot,okamstudio/godot,okamstudio/godot,ex/godot,ZuBsPaCe/godot,akien-mga/godot,Zylann/godot,RandomShaper/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,ZuBsPaCe/godot,sanikoyes/godot,DmitriySalnikov/godot,Shockblast/godot,Paulloz/godot,firefly2442/godot,DmitriySalnikov/godot,Paulloz/godot,josempans/godot,groud/godot,vkbsb/godot,Zylann/godot,ex/godot,NateWardawg/godot,guilhermefelipecgs/godot,godotengine/godot,vnen/godot,vkbsb/godot,honix/godot,vkbsb/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,vkbsb/godot,Faless/godot,BastiaanOlij/godot,Zylann/godot,firefly2442/godot,sanikoyes/godot,ZuBsPaCe/godot,sanikoyes/godot,ex/godot,ZuBsPaCe/godot,akien-mga/godot,okamstudio/godot,pkowal1982/godot,godotengine/godot,Valentactive/godot,firefly2442/godot,okamstudio/godot,ex/godot,Valentactive/godot,okamstudio/godot,groud/godot,vkbsb/godot,MarianoGnu/godot,akien-mga/godot,firefly2442/godot,BastiaanOlij/godot,vnen/godot,NateWardawg/godot,BastiaanOlij/godot,Paulloz/godot,mcanders/godot,MarianoGnu/godot,godotengine/godot,Faless/godot,Faless/godot,akien-mga/godot,honix/godot,MarianoGnu/godot,godotengine/godot,ex/godot,vnen/godot,akien-mga/godot,ex/godot,Faless/godot,honix/godot,Valentactive/godot,mcanders/godot,vnen/godot,firefly2442/godot,okamstudio/godot,vnen/godot,guilhermefelipecgs/godot,sanikoyes/godot,Shockblast/godot,godotengine/godot,josempans/godot,vnen/godot,Paulloz/godot,groud/godot,RandomShaper/godot,DmitriySalnikov/godot,firefly2442/godot,MarianoGnu/godot,firefly2442/godot,vkbsb/godot,groud/godot,Valentactive/godot,Zylann/godot,BastiaanOlij/godot,okamstudio/godot,vnen/godot,sanikoyes/godot,josempans/godot,NateWardawg/godot,guilhermefelipecgs/godot,DmitriySalnikov/godot,pkowal1982/godot,Valentactive/godot,Shockblast/godot,pkowal1982/godot,honix/godot,Valentactive/godot,Faless/godot,NateWardawg/godot,sanikoyes/godot,josempans/godot,mcanders/godot,pkowal1982/godot,josempans/godot,josempans/godot,josempans/godot,Zylann/godot,RandomShaper/godot,Zylann/godot,ZuBsPaCe/godot,RandomShaper/godot,RandomShaper/godot,mcanders/godot,okamstudio/godot,Shockblast/godot,ZuBsPaCe/godot,MarianoGnu/godot,akien-mga/godot,Shockblast/godot,ex/godot,mcanders/godot,BastiaanOlij/godot,Faless/godot,Faless/godot,BastiaanOlij/godot,Shockblast/godot,DmitriySalnikov/godot,firefly2442/godot,josempans/godot,DmitriySalnikov/godot,NateWardawg/godot,Paulloz/godot,Shockblast/godot,guilhermefelipecgs/godot,Shockblast/godot,vnen/godot,akien-mga/godot,NateWardawg/godot,NateWardawg/godot,pkowal1982/godot,ex/godot