Small issues with screenshots

[dsboger-zz]

I was visiting the Website for the first time and I noticed two small issues with the screenshots carousel:

• One of the images have a different height, so when the carousel switches to/from it, the content below shifts up and down.
• The screenshots clip the border and shadows of the windows. I think it would look better if the images portrayed whole windows (plus a small margin showing the wallpaper below and the shadow effect).

[bilelmoussaoui]

@dsboger The first issue is now fixed on master. For the screenshots, if anyone wants to do it, just clone the repository and replace those images https://github.com/gnunn1/tilix-web/tree/master/assets/images/gallery