Add pagination to secrets list + fix case sensitivity

[djenriquez]

Borrowing from the Token management's display, adding pagination to secrets hopefully to solve #109.

Improved filtering by removing case-sensitivity, #106 (comment), and allowing the last known matches to stay displayed rather than clearing the list.

[msessa]

Pagination works really well. Tested with 1000+ secrets and the UI performance was excellent

[msessa]

For truly case-insensitive search you need to lowercase both search text and search predicate. In this case it should be:
let filtered = v ? _.filter(this.state.fullSecretList, (item) => { return item.toLowerCase().includes(v.toLowerCase()); }) : this.state.fullSecretList;

[djenriquez]

Interesting, I had thought Vault was case-insensitive, so I figured i'd save on some compute cycles, but apparently thats not the case. Great catch, fix inc.

[djenriquez]

Changes are in, but the Docker build seems to be failing on

Step 5 : RUN npm install --silent && npm run build-web && npm prune --silent --production
 ---> Running in 630acfeb3091
/app/node_modules/electron/install.js:47
  throw err
  ^
Error: ENOENT: no such file or directory, lstat '/app/node_modules/electron/dist/resources'

I think NPM is just acting up right now, definitely seen similar behavior before. I actually can't even build master. I'll try again tomorrow morning before merging 👍

[msessa]

That's odd. TravisCI changed something in their build image perhaps?

Anyway, good job on those changes! LGTM merge at will :)