[IconSearchBar] Filter StoreList as user types + fire off server query for more stores filtered by searched term

[devYaoYH]

[Big] Enhancement feature (requires server work):

• Filter current list of stores by user input (as user types - dynamic)
• Remember to cache already retrieved results somewhere for more responsive filtering (when user backtracks etc)
• Fire off query to server (see below) when filtered list of stores drop below a certain amount
• [server] Fire off query to do a retrieval of nearby/(or not depending on availability of gps/location) stores constrained by searched query term
  • Likely requires an additional 'searchable' string field in our DB to match 'contains' against