JS and css cleanup

src/main/resources/static/js/githubVersion.js

@@ -0,0 +1,41 @@
+function compareVersions(version1, version2) {
+	const v1 = version1.split('.');
+	const v2 = version2.split('.');
+
+	for (let i = 0; i < v1.length || i < v2.length; i++) {
+		const n1 = parseInt(v1[i]) || 0;
+		const n2 = parseInt(v2[i]) || 0;
+
+		if (n1 > n2) {
+			return 1;
+		} else if (n1 < n2) {
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+async function getLatestReleaseVersion() {
+	const url = "https://api.github.com/repos/Frooodle/Stirling-PDF/releases/latest";
+	const response = await fetch(url);
+	const data = await response.json();
+	return data.tag_name.substring(1);
+}
+
+
+async function checkForUpdate() {
+	const latestVersion = await getLatestReleaseVersion();
+	console.log("latestVersion=" + latestVersion)
+	console.log("currentVersion=" + currentVersion)
+	console.log("compareVersions(latestVersion, currentVersion) > 0)=" + compareVersions(latestVersion, currentVersion))
+	if (latestVersion != null && latestVersion != "" && compareVersions(latestVersion, currentVersion) > 0) {
+		document.getElementById("update-btn").style.display = "block";
+		console.log("visible")
+	} else {
+		document.getElementById("update-btn").style.display = "none";
+		console.log("hidden")
+	}
+}
+
+checkForUpdate();