Demo updates and additions to Alert, Modal, OrderByPipe, and TableSortable

• Alert: Add ability to set an automatic close delay
• Modal: Add small and large modal size options
• OrderBy: Add ability to sort on an object's property within an array element (Ex: someArray | orderBy : ['someObj.Property', '-somethingElse']
• TableSortable: Add capability to disable sorting on a specified column
  • Example:

  columns: TableSortableColumn[] = [
    {
      display: 'Text', //The text to display
      variable: 'Text', //The name of the key that's apart of the data array
      filter: 'text', //The type data type of the column (number, text, date, etc.)
      sortable: true //Whether the user can sort on the column
    }, 
    new TableSortableColumn('Can Sort', 'Can', 'text'),
    new TableSortableColumn("Can't Sort", 'Cant', 'text', false)

• Demos: Fix selects within forms to use Bootstrap 4's c-select class