RichTextLabel: Fix adding raw text when bbcode is disabled
RichTextLabel: Fix adding raw text when bbcode is disabled

Fixes #5605.

Marqin/godot,Paulloz/godot,n-pigeon/godot,DmitriySalnikov/godot,godotengine/godot,pixelpicosean/my-godot-2.1,vnen/godot,okamstudio/godot,n-pigeon/godot,NateWardawg/godot,josempans/godot,mcanders/godot,pkowal1982/godot,FateAce/godot,huziyizero/godot,guilhermefelipecgs/godot,jejung/godot,MarianoGnu/godot,FateAce/godot,sanikoyes/godot,firefly2442/godot,honix/godot,tomreyn/godot,BastiaanOlij/godot,sanikoyes/godot,RandomShaper/godot,Marqin/godot,zicklag/godot,ex/godot,Marqin/godot,sanikoyes/godot,zicklag/godot,vkbsb/godot,josempans/godot,firefly2442/godot,Valentactive/godot,ex/godot,Valentactive/godot,RebelliousX/Go_Dot,huziyizero/godot,akien-mga/godot,guilhermefelipecgs/godot,Brickcaster/godot,godotengine/godot,firefly2442/godot,Zylann/godot,MarianoGnu/godot,akien-mga/godot,Brickcaster/godot,godotengine/godot,Zylann/godot,morrow1nd/godot,ex/godot,MrMaidx/godot,honix/godot,josempans/godot,akien-mga/godot,Paulloz/godot,ageazrael/godot,vkbsb/godot,MrMaidx/godot,vkbsb/godot,TheHX/godot,Shockblast/godot,Zylann/godot,RandomShaper/godot,ex/godot,ZuBsPaCe/godot,huziyizero/godot,godotengine/godot,TheHX/godot,Zylann/godot,BastiaanOlij/godot,RebelliousX/Go_Dot,Paulloz/godot,vnen/godot,Max-Might/godot,RebelliousX/Go_Dot,TheHX/godot,guilhermefelipecgs/godot,Brickcaster/godot,ageazrael/godot,ageazrael/godot,morrow1nd/godot,guilhermefelipecgs/godot,MrMaidx/godot,sanikoyes/godot,TheHX/godot,FateAce/godot,vnen/godot,Paulloz/godot,ficoos/godot,gau-veldt/godot,FateAce/godot,firefly2442/godot,vkbsb/godot,vkbsb/godot,Faless/godot,MrMaidx/godot,ZuBsPaCe/godot,sanikoyes/godot,okamstudio/godot,guilhermefelipecgs/godot,vnen/godot,Shockblast/godot,vnen/godot,okamstudio/godot,godotengine/godot,mcanders/godot,josempans/godot,Faless/godot,mcanders/godot,exabon/godot,Faless/godot,jejung/godot,josempans/godot,josempans/godot,akien-mga/godot,Shockblast/godot,BastiaanOlij/godot,zicklag/godot,Max-Might/godot,Zylann/godot,n-pigeon/godot,Zylann/godot,NateWardawg/godot,NateWardawg/godot,honix/godot,Marqin/godot,rollenrolm/godot,Valentactive/godot,Valentactive/godot,ficoos/godot,NateWardawg/godot,vnen/godot,RandomShaper/godot,Paulloz/godot,RandomShaper/godot,jejung/godot,groud/godot,pkowal1982/godot,jejung/godot,Shockblast/godot,firefly2442/godot,RandomShaper/godot,DmitriySalnikov/godot,RebelliousX/Go_Dot,pixelpicosean/my-godot-2.1,mcanders/godot,Marqin/godot,Faless/godot,FateAce/godot,Paulloz/godot,ex/godot,pixelpicosean/my-godot-2.1,tomreyn/godot,firefly2442/godot,mcanders/godot,DmitriySalnikov/godot,pkowal1982/godot,RebelliousX/Go_Dot,godotengine/godot,pixelpicosean/my-godot-2.1,akien-mga/godot,huziyizero/godot,sanikoyes/godot,morrow1nd/godot,n-pigeon/godot,TheHX/godot,BastiaanOlij/godot,okamstudio/godot,ZuBsPaCe/godot,Max-Might/godot,morrow1nd/godot,morrow1nd/godot,sanikoyes/godot,honix/godot,Brickcaster/godot,Brickcaster/godot,rollenrolm/godot,okamstudio/godot,vkbsb/godot,rollenrolm/godot,BastiaanOlij/godot,godotengine/godot,groud/godot,zicklag/godot,Valentactive/godot,okamstudio/godot,BastiaanOlij/godot,Valentactive/godot,zicklag/godot,n-pigeon/godot,ficoos/godot,exabon/godot,exabon/godot,honix/godot,jejung/godot,MarianoGnu/godot,Faless/godot,NateWardawg/godot,Max-Might/godot,ZuBsPaCe/godot,gau-veldt/godot,guilhermefelipecgs/godot,ficoos/godot,ageazrael/godot,NateWardawg/godot,pkowal1982/godot,Shockblast/godot,Faless/godot,Faless/godot,rollenrolm/godot,pkowal1982/godot,vkbsb/godot,ZuBsPaCe/godot,NateWardawg/godot,tomreyn/godot,ex/godot,DmitriySalnikov/godot,akien-mga/godot,firefly2442/godot,guilhermefelipecgs/godot,Valentactive/godot,Shockblast/godot,morrow1nd/godot,DmitriySalnikov/godot,MrMaidx/godot,tomreyn/godot,groud/godot,rollenrolm/godot,sanikoyes/godot,josempans/godot,firefly2442/godot,pixelpicosean/my-godot-2.1,ficoos/godot,vnen/godot,ex/godot,ZuBsPaCe/godot,ageazrael/godot,n-pigeon/godot,huziyizero/godot,gau-veldt/godot,n-pigeon/godot,akien-mga/godot,groud/godot,Marqin/godot,okamstudio/godot,honix/godot,ZuBsPaCe/godot,okamstudio/godot,Brickcaster/godot,ex/godot,Brickcaster/godot,okamstudio/godot,MarianoGnu/godot,NateWardawg/godot,guilhermefelipecgs/godot,pkowal1982/godot,Shockblast/godot,josempans/godot,Zylann/godot,okamstudio/godot,exabon/godot,Valentactive/godot,BastiaanOlij/godot,groud/godot,exabon/godot,vnen/godot,groud/godot,Paulloz/godot,DmitriySalnikov/godot,BastiaanOlij/godot,ficoos/godot,pkowal1982/godot,DmitriySalnikov/godot,jejung/godot,MarianoGnu/godot,MarianoGnu/godot,RebelliousX/Go_Dot,Shockblast/godot,gau-veldt/godot,MarianoGnu/godot,MarianoGnu/godot,mcanders/godot,MrMaidx/godot,tomreyn/godot,ageazrael/godot,ZuBsPaCe/godot,pkowal1982/godot,RandomShaper/godot,FateAce/godot,gau-veldt/godot,vkbsb/godot,Faless/godot,Zylann/godot,akien-mga/godot,ageazrael/godot,exabon/godot,RandomShaper/godot,Max-Might/godot,NateWardawg/godot,zicklag/godot,godotengine/godot,Max-Might/godot