[TASK] directives: Small JSCS fix

And a small experimentation.
If you run this command on your local ripple-client directory
```git log --format= --numstat | cut -f3- | sort | uniq -c | sort -nr | head -30```

you get the most commonly modified files.
    432 src/less/ripple/tabs.less
    220 src/js/tabs/send.js
    217 src/jade/tabs/trust.jade
    217 index.html
    211 src/jade/tabs/send.jade
    210 src/jade/tabs/trade.jade
    195 src/js/tabs/trade.js
    155 src/js/tabs/trust.js
    145 src/jade/tabs/register.jade
    141 src/jade/tabs/balance.jade
    138 deps/js/ripple.js
    116 src/jade/tabs/history.jade
    116 package.json
    109 Gruntfile.js
    102 src/less/ripple/content.less
     97 src/less/ripple/layout.less
     95 src/jade/tabs/contacts.jade
     93 src/js/controllers/app.js
     93 src/jade/tabs/login.jade
     85 src/js/tabs/register.js
     83 src/js/tabs/balance.js
     83 src/jade/client/navbar.jade
     79 src/js/directives/validators.js
     79 src/js/client/model.js
     70 src/jade/client/index.jade
     68 src/js/entry/desktop.js
     68 src/jade/tabs/security.jade
     68 js/ncc.js
     64 src/js/services/id.js
     64 src/js/directives/directives.js

Either those files have the most critical functionality of the client
  or if the files are too big and need to be split/redistributed.

Additionally, it would be interesting to see how the distribution compares with
mixpanel heat chart?