I am having issues making the logo bigger using launchpad theme in WAB 2.5. I have made the changes that Robert suggested https://community.esri.com/thread/190393-make-applicaiton-logo-larger#comment-707482 but for some reason it doesn't seem to work. I am curious if anyone else has had this same issue or is it just me? I have uninstalled and re-installed 2.5 several times but i get the same results. Here are the steps i have taken.
1. Created an new app (Tester),
2. Clicked on 'Launchpad Theme',
3. Clicked on 'Attribute',
4. Changed the icon,
5. Save the app.
6. Made changes as i describe above.