make margin depend on high contrast mode, based on comment on pr

src/lib/components/chat/ModelSelector.svelte

@@ -49,7 +49,7 @@
 	{#each selectedModels as selectedModel, selectedModelIdx}
 		<div class="flex w-full max-w-fit">
 			<div class="overflow-hidden w-full">
-				<div class="m-1 max-w-full">
+				<div class="max-w-full {($settings?.highContrastMode ?? false) ? 'm-1' : 'mr-1'}">
 					<Selector
 						id={`${selectedModelIdx}`}
 						placeholder={$i18n.t('Select a model')}