Slint: Properly size Slint logo link in About dialog for Firefox

For some reason the link wasn't sized correctly, it's smaller than the
logo and looks buggy. Setting this as an inline-block fixes this.

I tested this on Firefox and Chromium, it doesn't appear to be an issue
on Chrome but this fix doesn't regress there either.

Author: redstrate

tools/slintpad/src/dialogs.ts

@@ -147,7 +147,7 @@ export function about_dialog() {
           <center>
           <h1>Welcome to SlintPad</h1>
 
-          <a href="https://slint.dev/" target="_blank"><img src="https://slint.dev/logo/slint-logo-simple-light.svg"></a>
+          <a href="https://slint.dev/" target="_blank" class="slint-logo-link"><img src="https://slint.dev/logo/slint-logo-simple-light.svg" width="141" height="42"></a>
           </center>
 
           <p><a href="https://slint.dev/" target="_blank">Slint</a> is a toolkit to efficiently develop fluid graphical user interfaces for

tools/slintpad/styles/content.css

@@ -202,3 +202,7 @@
     content: "✓";
     padding-left: 5px;
 }
+
+.dialog.about_dialog .slint-logo-link {
+    display: inline-block;
+}