Make date input methods uniform

[toraritte]

Settled on is slate-1's simple design, because:

• "JAWS users can just hit C to jump to the combo box"
• the input is pre-populated with the current date

[toraritte]

1. • [ ] Do an inventory of pages that have a date input.
2. • [ ] Figure out how to make re-usable UI components (i.e., once inserted, they would all behave the same, and one change would propagate to every instance).
3. • [ ] Replace every date input discovered in step 1.

The example HTML from slate-1:

<tr>
   <td align="right">Start Date:</td>
   <td>
      <select name="selStartMonth" id="selStartMonth" title="Start Month">
         <option value="1">January</option>
         <option value="2">February</option>
         <option value="3">March</option>
         <option value="4">April</option>
         <option selected="selected" value="5">May</option>
         <option value="6">June</option>
         <option value="7">July</option>
         <option value="8">August</option>
         <option value="9">September</option>
         <option value="10">October</option>
         <option value="11">November</option>
         <option value="12">December</option>
      </select>
      <select name="selStartDay" id="selStartDay" title="Start Day" size="1">
         <option value="1">1</option>
         <option value="2">2</option>
         <option value="3">3</option>
         <option value="4">4</option>
         <option value="5">5</option>
         <option value="6">6</option>
         <option value="7">7</option>
         <option value="8">8</option>
         <option value="9">9</option>
         <option value="10">10</option>
         <option value="11">11</option>
         <option value="12">12</option>
         <option value="13">13</option>
         <option value="14">14</option>
         <option value="15">15</option>
         <option value="16">16</option>
         <option value="17">17</option>
         <option value="18">18</option>
         <option selected="selected" value="19">19</option>
         <option value="20">20</option>
         <option value="21">21</option>
         <option value="22">22</option>
         <option value="23">23</option>
         <option value="24">24</option>
         <option value="25">25</option>
         <option value="26">26</option>
         <option value="27">27</option>
         <option value="28">28</option>
         <option value="29">29</option>
         <option value="30">30</option>
         <option value="31">31</option>
      </select>
      ,
      <select name="selStartYear" id="selStartYear" title="Start Year" size="1">
         <option value="2013">2013</option>
         <option value="2014">2014</option>
         <option value="2015">2015</option>
         <option value="2016">2016</option>
         <option value="2017">2017</option>
         <option value="2018">2018</option>
         <option value="2019">2019</option>
         <option value="2020">2020</option>
         <option value="2021">2021</option>
         <option value="2022">2022</option>
         <option selected="selected" value="2023">2023</option>
         <option value="2024">2024</option>
         <option value="2025">2025</option>
         <option value="2026">2026</option>
         <option value="2027">2027</option>
         <option value="2028">2028</option>
         <option value="2029">2029</option>
         <option value="2030">2030</option>
         <option value="2031">2031</option>
         <option value="2032">2032</option>
      </select>
   </td>
</tr>