Fixes base font-size of popped out terminal.

Share the rest of the base styles too so the embedded and popped out
terminal are working from a common style base.

client/app/styles/_base.scss

@@ -61,7 +61,7 @@
   opacity: 0;
 }
 
-.scope-app {
+.scope-app, .terminal-app {
   -webkit-font-smoothing: antialiased;
   background: $body-background-color;
   bottom: 0;
@@ -977,11 +977,6 @@
 .terminal {
 
   &-app {
-    position: fixed;
-    top: 0;
-    bottom: 0;
-    left: 0;
-    right: 0;
     display: flex;
     flex-flow: column;
   }