segmenter_page (html, css): more meaningful 'export FASTA' button, more logic placement

browser/css/segmenter_page.css

@@ -1933,7 +1933,7 @@ textarea {
   resize: none;
   margin-top: 2%;
   height: 65%;
-  width: 98%;
+  width: 100%;
 }
 #scatter_panel {
   -webkit-flex: 2 32%;
@@ -1991,4 +1991,9 @@ textarea {
 
 .big-icon {
   font-size: 250%;
+}
+
+#btn_exportfasta {
+  position: absolute;
+  right: 10px;
 }
\ No newline at end of file

browser/segmenter_page.html

@@ -29,7 +29,7 @@
                     <textarea autofocus id="form_sequences" name="sequences" rows="10" cols="80" placeholder="Enter up to 10 sequences in FASTA format..."></textarea>
                     <div id="bottom_form">
                         <input id="form_submit" type="button" value="Submit" />
-                        <button id="btn_exportfasta" class="btn_feature">Export to FASTA</button>
+                        <button id="btn_exportfasta" class="btn_feature">Export results to FASTA</button>
                     </div>
                 </form>
                 <p id="copyright">reference: <a href="http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0166126">(Duez, 2016)</a></p>