Add an item sheet for editing Traits

templates/Apps/TraitSheet/style.css

@@ -0,0 +1,35 @@
+.ripcrypt.TraitSheet {
+	--input-underline: none;
+	max-width: 300px;
+
+	> .window-content {
+		display: flex;
+		flex-direction: column;
+		gap: 8px;
+		padding: 4px;
+		color: var(--base-text);
+		background: var(--base-background);
+	}
+
+	input {
+		border-radius: 4px;
+		padding: 2px 4px;
+	}
+
+	.value {
+		background: var(--input-background);
+		color: var(--input-text);
+		padding: 4px;
+
+		> :first-child {
+			margin-top: 0;
+		}
+		> :last-child {
+			margin-bottom: 0;
+		}
+
+		&:empty {
+			display: none;
+		}
+	}
+}