Add icon and adjust build settings for first release.

org.eyecreate.qiflora.json

@@ -4,8 +4,7 @@
     "runtime-version": "5.12",
     "sdk": "org.kde.Sdk",
     "command": "qiflora",
-    "tags": ["nightly"],
-    "desktop-file-name-suffix": " (Nightly)",
+    "tags": ["kde"],
     "finish-args": [
         "--share=ipc",
         "--allow=bluetooth",