List function does not have any sorting methods for same next contact date

[jevan13]

• The list is understood to be sorted by next contact date
• Within people who have the same contact date, there seems to be no sorting method
• Causes inconvenience to users, especially when there are many elderly that have the same next contact date
• Very likely to happen to all users, since theres definitely more than just a few elderly in the program

Example:

• If a user wants to find an elderly who they know has the next contact date tomorrow, but there are also 40 more elderly whos next contact date is also tomorrow
• ContactMate does not have a sort function, nor a find by next contact date function
• User has no choice but to look through all 40 elderly until they find the right one
• This defeats the function of the application of "getting your contact management tasks done faster", mentioned in the first section of the UG

Step to reproduce:

1. Add 3 elderly, all with the same next contact date
2. List