Improve metadata to follow Flathub guidelines (#935)

Author: AlexanderVanhee

dist/screenshots/linux_main.png

@@ -50,7 +50,7 @@
 	<name xml:lang="uk">Fedora Media Writer</name>
 	<name xml:lang="zh-cn">Fedora Media Writer</name>
 	<name xml:lang="zh-tw">Fedora 媒體寫入器</name>
-	<summary>A tool to create a live USB drive with an edition of Fedora</summary>
+	<summary>Create a Fedora live USB drive</summary>
 	<summary xml:lang="ar">أداة لإنشاء محرك أقراص USB تقوم بتشغيل إحدى إصدارات فيدورا مباشرة</summary>
 	<summary xml:lang="az">Fedora Buraxılışı ilə Live USB diski yaratmaq üçün bir vasitədir</summary>
 	<summary xml:lang="be">Інструмент для стварэння носьбітаў Live USB з пэўным выпускам Fedora</summary>
@@ -96,6 +96,10 @@
 	<summary xml:lang="uk">Інструмент для створення портативних дисків USB із редакцією Fedora</summary>
 	<summary xml:lang="zh-cn">一个用来创建 Live USB 启动盘的 Fedora 版工具</summary>
 	<summary xml:lang="zh-tw">為各種 Fedora 版本製作 Live USB 裝置的工具</summary>
+	<branding>
+		<color type="primary" scheme_preference="light">#aad0ee</color>
+		<color type="primary" scheme_preference="dark">#3c6eb4</color>
+	</branding>
 	<description>
 		<p>A tool to create a bootable live USB drive with an edition of Fedora. Not only can Fedora Media Writer write an image to your flash drive, it can also download it for you. It offers official editions (Server, Workstation), Fedora spins (KDE Plasma Desktop, Xfce Desktop, Cinnamon Desktop,...), and Fedora Labs (Design Suite, Security Lab,...). It provides basic information about each of them to help you make the right choice.</p>
 		<p xml:lang="ar">أداة لإنشاء محرك أقراص USB مباشر قابلة للإقلاع بإحدى إصدارات فيدورا. لا يقوم كاتب وسائط فيدورا بكتابة صورة القرص وحسب، بل بوسعه أيضًا تنزيلها لك. يدعم الإصدارات الرسمية (الخادوم ومحطة العمل)، ومتحوِّرات فيدورا (أسطح مكتب كيدي وإكسفس وسينامن...) ومختبرات فيدورا (Desgin Suite وSecurity Lab...). كما يعطيك معلومات أساسية عن كل واحد منهم لمساعدتك في اختيار الأنسب.</p>

dist/screenshots/linux_select_release.png

@@ -7,7 +7,11 @@
 	<project_license>GPL-2.0+</project_license>
 	<metadata_license>CC0-1.0</metadata_license>
 	<name>Fedora Media Writer</name>
-	<summary>A tool to create a live USB drive with an edition of Fedora</summary>
+	<summary>Create a Fedora live USB drive</summary>
+	<branding>
+		<color type="primary" scheme_preference="light">#aad0ee</color>
+		<color type="primary" scheme_preference="dark">#3c6eb4</color>
+	</branding>
 	<description>
 		<p>A tool to create a bootable live USB drive with an edition of Fedora. Not only can Fedora Media Writer write an image to your flash drive, it can also download it for you. It offers official editions (Server, Workstation), Fedora spins (KDE Plasma Desktop, Xfce Desktop, Cinnamon Desktop,...), and Fedora Labs (Design Suite, Security Lab,...). It provides basic information about each of them to help you make the right choice.</p>
 		<p>Fedora Media Writer can also write other bootable ISOs loaded from your local disk, but keep in mind that it's only tested with Fedora images.</p>
@@ -25,7 +29,7 @@
 	<url type="homepage">https://github.com/FedoraQt/MediaWriter</url>
         <url type="translate">https://translate.fedoraproject.org/engage/fedora-media-writer</url>
 	<screenshots>
-	<screenshot type="default"><image type="source">https://github.com/FedoraQt/MediaWriter/raw/main/dist/screenshots/linux_main.png</image></screenshot>
+		<screenshot type="default"><image type="source">https://github.com/FedoraQt/MediaWriter/raw/main/dist/screenshots/linux_main.png</image></screenshot>
 	    <screenshot><image type="source">https://github.com/FedoraQt/MediaWriter/raw/main/dist/screenshots/linux_select_release.png</image></screenshot>
 	</screenshots>
 	<developer_name>Jan Grulich</developer_name>