Fix textarea size

client/src/app/+admin/plugins/plugin-show-installed/plugin-show-installed.component.scss

@@ -5,9 +5,15 @@ h2 {
   margin-bottom: 20px;
 }
 
-textarea,
 input:not([type=submit]) {
   @include peertube-input-text(340px);
+
+  display: block;
+}
+
+textarea {
+  @include peertube-textarea(340px, 200px);
+
   display: block;
 }
 

client/src/sass/include/_mixins.scss

@@ -833,7 +833,7 @@
   font-size: 90%;
   color: var(--mainForegroundColor);
   height: $avatar-height;
-  line-height: .9rem;
+  line-height: 1rem;
   margin: .1rem;
   max-width: 320px;
   overflow: hidden;