[GitHub] zeppelin issue #2174: [ZEPELIN-2209] Add pagination to Helium menu

[1ambda]

Github user 1ambda commented on the issue:

    https://github.com/apache/zeppelin/pull/2174
  
    @AhyoungRyu more precisely,
    
    1. If we are in page 1, we don't need `<<`
    
    
![image](https://cloud.githubusercontent.com/assets/4968473/24408510/e39c618c-1408-11e7-8451-1dc3b1249987.png)
    
    2. If we are in some pages which can go to page 1, we need both `<<` && `>>`
    
    
![image](https://cloud.githubusercontent.com/assets/4968473/24408522/f5e9c71c-1408-11e7-9d29-09b6db161462.png)
    
    3. the last case
    
    
![image](https://cloud.githubusercontent.com/assets/4968473/24408544/05b8cfbc-1409-11e7-8768-c2db21ca2a69.png)


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