Replace font awesome font with svg

src/styles/_page.project.panel.scss

@@ -1,7 +1,6 @@
 @use "common";
 @use "var";
 @use "color";
-@use "fa";
 
 $panel-width: 30vw;
 $panel-width-max: "400px + 3 * #{var.$block-spacing}";
@@ -91,9 +90,6 @@ $panel-actual-width: min($panel-width, #{$panel-width-max});
 				text-decoration: none;
 			}
 	
-			&+ button, &+ a.button {
-				margin-left: var.$elem-spacing;
-			}
 		}
 	}
 
@@ -141,15 +137,14 @@ $panel-actual-width: min($panel-width, #{$panel-width-max});
 		&.map-control-icon {
 			cursor: pointer;
 
-			.fa {
-				@extend .fa-fw;
+			.spot-icon {
 				color: color.$default;
 			}
 
 			&:hover {
 				background-color: color.$default-inv-bg;
 
-				.fa {
+				.spot-icon {
 					color: color.$default-inv;
 				}
 			}