Fix placeholders position in `LineEdit` when editing inside the Editor
Fix placeholders position in `LineEdit` when editing inside the Editor

Editing the `Text` property through the editor causes a wrong
placement of the placeholder, as it calls `LineEdit::clear_internal`,
which was wrongly reseting the cached placeholder width.

Fix #18184.

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