Add a search capability to search messages

[jonverrier]

Likely a panel at the top - do some research on UI patterns.

[jonverrier]

https://stackoverflow.com/questions/9127498/how-to-perform-a-real-time-search-and-filter-on-a-html-table

function searchTable(){
var term, table;
// get term to search
term = document.getElementById("myInput").value.toLowerCase();

// get table rows, handle as array.
table = Array.from(document.getElementById("myTable").rows);

// filter non-matching rows; these are set to display='none'
table.filter(function(el){return el.textContent.toLowerCase().indexOf(term) == 
-1}).map(x=> x.style.display = "none");

// filter matching rows; these are set to display =''
table.filter(function(el){return el.textContent.toLowerCase().indexOf(term) > -1}).map(x=> x.style.display = "");

}