Improve "Other" classification in pie chart gadget

Problem Definition

1. "Other" classification in pie chart is shown in decreasing order of tickets as the other classification are
2. Classifications which have the minimum number of tickets are not aggregated to "Other" classification

Suggested Solution

1. "Other" classification should be shown as the last part in decreasing order
   
2. All the classification which have the minimum number of tickets should be aggregated to "Other" classification