Update changelog and add metadata for v3.4.0

CHANGELOG.md

@@ -10,6 +10,7 @@
 - Added an option to disable update checking on startup for release binaries (fixes #66).
 - The receive page now shows which code a received item came from.
 - Various improvements to performance and memory usage.
+- Updated `fyne` to [v2.3.5](https://github.com/fyne-io/fyne/releases/tag/v2.3.5) for many bug fixes.
 
 ## 3.3.6 - Crash fix for copying received text
 - Fixed a crash when pressing the copy button in the text receive window (fixes #83).

internal/assets/unix/io.github.jacalz.rymdport.appdata.xml

@@ -45,6 +45,21 @@
   </kudos>
 
   <releases>
+	<release version="3.4.0" date="2023-06-07" type="stable">
+      <description>
+        <ul>
+          <li>QR codes can now be generated for easily sending items to supported apps.</li>
+          <li>Progress bars no longer display the wrong percentage sometimes.</li>
+          <li>Fixed a potential crash that could happen sometimes when sending.</li>
+          <li>Added support for removing items that have completed the transfer.</li>
+          <li>Added keyboard shortcuts for switching between tabs.</li>
+          <li>The receive page now shows which code a received item came from.</li>
+          <li>Various improvements to performance and memory usage.</li>
+          <li>Updated fyne to v2.3.5 for many bug fixes.</li>
+        </ul>
+      </description>
+      <url type="details">https://github.com/Jacalz/rymdport/releases/tag/v3.3.5</url>
+    </release>
     <release version="3.3.6" date="2023-05-11" type="stable">
       <description>
         <ul>