Add ability to undo auto-indent
Add ability to undo auto-indent

Closes #10420.

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