Update some sentences related to suspending a link.

gns3server/controller/link.py

@@ -135,7 +135,7 @@ class Link:
     def get_active_filters(self):
         """
         Return the active filters.
-        If the node is suspend the filters will be override
+        Filters are overridden if the link is suspended.
         """
         if self._suspend:
             return {"frequency_drop": [-1]}

gns3server/controller/udp_link.py

@@ -199,7 +199,7 @@ class UDPLink(Link):
             if node["node"].node_type and node["node"].status == "started":
                 return node
 
-        raise aiohttp.web.HTTPConflict(text="Can not capture because no running device on this link")
+        raise aiohttp.web.HTTPConflict(text="Cannot capture because there is no running device on this link")
 
     @asyncio.coroutine
     def read_pcap_from_source(self):