add upload to hololink foolproof instruction

popup.html

@@ -76,7 +76,7 @@
                 <small id="userIndicator" class="form-text text-muted web-title-help"></small>
             </div>
             <div class="searchable-project-dropdown" style="margin: 20px 5%;">
-                <select class="selectpicker form-control" multiple id="select-project" aria-placeholder="Choose project" data-live-search="true">         
+                <select class="selectpicker form-control" multiple id="select-project" aria-placeholder="Choose project" data-live-search="true" title="Upload to one or multiple galaxies">         
                 </select>
                 <small class="form-text text-muted" style="padding-left: 10px;">If you doesn't get any option, please create galaxy at home page first.</small>
             </div>
@@ -94,7 +94,7 @@
             <hr>
 
             <div class="popup_spacing" row='2'></div>
-            <button id="upload_hololink_button" class="btn btn-light upload_hololink_button">Upload Hololink</button>
+            <button id="upload_hololink_button" class="btn btn-light upload_hololink_button">Upload to Hololink</button>
             <small class="upload_warning" id="upload_warning"></small>
         </div>
     </body>

src/popup.js

@@ -27,7 +27,7 @@ $(function(){
 
     // Upload foolproof
     $('#upload_hololink_button').prop("disabled", true);
-    $('#upload_warning').html(`Please choose project`)
+    $('#upload_hololink_button').html(`Galaxy is not selected`)
 
     chrome.tabs.query({active:true, currentWindow:true},function(tab){ /*之所以要放上 currentWindow 的原因在於如果不加這個指令，系統會以為你是指 popup，這樣會回傳 undefined */
 
@@ -81,8 +81,10 @@ $(function(){
 
         if ( !Array.isArray(userSelectedProjectsId) || !userSelectedProjectsId.length ){
             $('#upload_hololink_button').prop("disabled", true);
+            $('#upload_hololink_button').html(`Galaxy is not selected`)
         } else {
             $('#upload_hololink_button').prop("disabled", false);
+            $('#upload_hololink_button').html(`Upload to Hololink`)
         }
         console.log(userSelectedProjectsId)
     });