HackStudio: Scroll embedded terminals to bottom upon command execution

It was kinda annoying that you had to scroll down manually every time
you started a new build while looking at some error in the scrollback.

DevTools/HackStudio/TerminalWrapper.cpp

@@ -154,6 +154,9 @@ void TerminalWrapper::run_command(const String& command)
         }
         ASSERT_NOT_REACHED();
     }
+
+    // (In parent process)
+    terminal().scroll_to_bottom();
 }
 
 void TerminalWrapper::kill_running_command()