added border radius for about dialog

src/base.css

@@ -1,6 +1,6 @@
 window {
-    border-bottom-left-radius: 7;
-    border-bottom-right-radius: 7;
+    border-bottom-left-radius: 7px;
+    border-bottom-right-radius: 7px;
 }
 
 .homepage button {
@@ -8,4 +8,8 @@ window {
     padding: 10px 30px;
     border: none;
     border-radius: 5px 5px 5px 5px;
+}
+
+.aboutdialog {
+    border-radius: 7px;
 }

src/manjaro_hello.py

@@ -330,6 +330,7 @@ class Hello(Gtk.Window):
             self.set_autostart(action.get_active())
         elif name == "about":
             dialog = self.builder.get_object("aboutdialog")
+            dialog.set_decorated(False)
             dialog.run()
             dialog.hide()
         elif name == "appBrowser":

ui/manjaro-hello.glade

@@ -665,5 +665,8 @@ Stéphane
         </child>
       </object>
     </child>
+    <style>
+      <class name="aboutdialog"/>
+    </style>
   </object>
 </interface>