fix scaling of images on small screen widths

pages/news/2020-05-16-intro-outro-sections.html

@@ -16,14 +16,14 @@
 When analyzing a track, Mixxx detects where the first and last sounds are to make it easy to skip playing silent parts at the beginning and end of the track.
 The analyzer places the intro start point at the first sound and the outro end point at the last sound. The first and last sound are determined by the first time the signal rises above -60 dBFS and the last time it goes below -60 dBFS.
 
-<img src="/static/images/news/intro-outro/intro-start-outro-end.png" style="max-width: 465px;" alt="A track with the automatically placed intro start and outro end cues"/>
+<img src="/static/images/news/intro-outro/intro-start-outro-end.png" style="max-height: 137px; max-width: 100%;" alt="A track with the automatically placed intro start and outro end cues"/>
 
 It is up to you to decide where to place the intro end and outro start points.
 You can easily jump to the intro end and outro start points by pressing the buttons like hotcues, but that is not their primary purpose.
 Marking the whole intro and outro allows Mixxx to calculate how long each section is and show it on the overview waveform.
 You can use this information to inform when you press play on the next track and so can AutoDJ.
 
-<img src="/static/images/news/intro-outro/intro-outro-full.png" style="max-width: 465px;" alt="A track with the full intro and outro marked"/>
+<img src="/static/images/news/intro-outro/intro-outro-full.png" style="max-height: 137px; max-width: 100%;" alt="A track with the full intro and outro marked"/>
 
 ## Intro & Outro Mixing Techniques Before Mixxx 2.3 ##
 
@@ -71,7 +71,7 @@
 If I don't have time to find the outro end point before mixing in the track, I can use the new deck cloning feature to drag and drop to a new deck, then seek ahead on the new deck and listen in my headphones to mark the outro start point.
 If I don't have time to do that either, I right click on the overview waveform where I think the outro starts and look how far that is from the end of the track to compare it to the length of the intro of the next track.
 
-<img src="/static/images/news/intro-outro/outro-right-click.png" style="max-width: 464px;" alt="Right clicking on the overview waveform to approximate the length of the outro"/>
+<img src="/static/images/news/intro-outro/outro-right-click.png" style="max-height: 137px; max-width: 100%;" alt="Right clicking on the overview waveform to approximate the length of the outro"/>
 
 Here I see that the outro is approximately 30 seconds long. However, I also see that the analyzer placed the outro end point before the end of the track, so the outro is actually a little bit shorter than 30 seconds. Without marking the outro start point, I would have to do some math in my head to find exactly how long the outro is.