[WebUI] Show trial log for pai and k8s (#580)

* [WebUI] Show trial log for pai and k8s

* fix lint

* Fix comments

docs/FAQ.md

@@ -9,12 +9,12 @@ When met errors like below, try to clean up **tmp** folder first.
 ### Cannot get trials' metrics in OpenPAI mode
 In OpenPAI training mode, we start a rest server which listens on 51189 port in nniManager to receive metrcis reported from trials running in OpenPAI cluster. If you didn't see any metrics from WebUI in OpenPAI mode, check your machine where nniManager runs on to make sure 51189 port is turned on in the firewall rule. 
 
-### Segmentation Fault (core dumped) when installing from source code
+### Segmentation Fault (core dumped) when installing
 > make: *** [install-XXX] Segmentation fault (core dumped)
-There are two options:
 
+Please try the following solutions in turn:
 * Update or reinstall you current python's pip like `python3 -m pip install -U pip`
-* Install nni with --no-cache-dir flag like `python3 -m pip install nni --no-cache-dir`
+* Install nni with `--no-cache-dir` flag like `python3 -m pip install nni --no-cache-dir`
 
 ### Job management error: getIPV4Address() failed because os.networkInterfaces().eth0 is undefined.
 Your machine don't have eth0 device, please set nniManagerIp in your config file manually. [refer](https://github.com/Microsoft/nni/blob/master/docs/ExperimentConfig.md)