apply more styles to our icons - fixes #1081

the way we replace icons, the `ti` class gets removed, so those styles
were not applied; we always add a `ph-lg` class, so we select on that
one

I've left the `ti` selectors to hopefully make future merge conflicts
clearer

packages/frontend-embed/src/style.scss

@@ -101,7 +101,7 @@ rt {
 	}
 }
 
-.ti {
+.ti, ph-lg {
 	width: 1.28em;
 	vertical-align: -12%;
 	line-height: 1em;

packages/frontend/src/pages/page.vue

@@ -347,7 +347,7 @@ definePage(() => ({
 	text-align: center;
 	border-radius: 99rem;
 
-	& :global(.ti) {
+	& :global(.ti), & :global(.ph-lg) {
 		line-height: 2.5rem;
 	}