Allow activation of legacy and inactive licenses

Fixes #6089

src/Cms/License.php

@@ -391,7 +391,7 @@ public function request(string $path, array $data): array
 	 */
 	public function save(): bool
 	{
-		if ($this->status() !== LicenseStatus::Active) {
+		if ($this->status()->activatable() !== true) {
 			throw new InvalidArgumentException([
 				'key' => 'license.verification'
 			]);

src/Cms/LicenseStatus.php

@@ -43,6 +43,22 @@ enum LicenseStatus: string
 	 */
 	case Missing = 'missing';
 
+	/**
+	 * Checks if the license can be saved when it
+	 * was entered in the activation dialog;
+	 * renewable licenses are accepted as well
+	 * to allow renewal from the Panel
+	 */
+	public function activatable(): bool
+	{
+		return match ($this) {
+			static::Active   => true,
+			static::Inactive => true,
+			static::Legacy   => true,
+			default          => false
+		};
+	}
+
 	/**
 	 * Returns the dialog according to the status
 	 */

tests/Cms/System/LicenseTest.php

@@ -402,7 +402,7 @@ public function testRenewal()
 	/**
 	 * @covers ::save
 	 */
-	public function testSaveWhenNotActive()
+	public function testSaveWhenNotActivatable()
 	{
 		$license = new License();