Add notice about no self-restarts on windows

data/static/admin.js

@@ -1120,7 +1120,10 @@ document.getElementById('settingsSave').onclick = function() {
     }
     if (restart_setting_changed) {
         document.getElementById('applyRestarts').onclick = function(){ sendConfig('restartModal'); };
-        document.getElementById('applyAndRestart').onclick = function(){ sendConfig('restartModal', restart=true); };
+        let restartButton = document.getElementById('applyAndRestart')
+        if (restartButton) {
+            restartButton.onclick = function(){ sendConfig('restartModal', restart=true); };
+        }
         settingsModal.hide();
         restartModal.show();
     } else if (settings_changed) {

data/templates/admin.html

@@ -269,6 +269,15 @@
                     <div class="modal-header">
                         <h5 class="modal-title">Warning</h5>
                     </div>
+                    {{ if .windows }}
+                    <div class="modal-body">
+                        <p>A restart is needed to apply some settings. Self-restarts aren't possible on Windows, so you must restart manually.</p>
+                    </div>
+                    <div class="modal-footer">
+                        <button type="button" class="btn btn-light" data-dismiss="modal">Cancel</button>
+                        <button type="button" class="btn btn-secondary" id="applyRestarts" data-dismiss="modal">Apply, Restart manually</button>
+                    </div>
+                    {{ else }}
                     <div class="modal-body">
                         <p>A restart is needed to apply some settings. Restart now, later, or cancel?</p>
                     </div>
@@ -277,6 +286,7 @@
                         <button type="button" class="btn btn-secondary" id="applyRestarts" data-dismiss="modal">Apply, Restart later</button>
                         <button type="button" class="btn btn-primary" id="applyAndRestart" data-dismiss="modal">Apply &amp; Restart</button>
                     </div>
+                    {{ end }}
                 </div>
             </div>
         </div>

data/templates/setup.html

@@ -359,7 +359,11 @@
                             <div class="card-body text-center">
                                 <h5 class="card-title">Finished!</h5>
                                 <p class="card-text">
+                                {{ if .windows }}
+                                Press the button below to submit your settings. Unfortunately you're running on Windows, so jfa-go <a href="https://github.com/golang/go/issues/30662">cannot restart itself.</a> You will manually have to restart.
+                                {{ else }}
                                 Press the button below to submit your settings. The program will restart. Once it's done, refresh this page.
+                                {{ end }}
                                 </p>
                                 <button id="submitButton" class="btn btn-primary">Submit</button>
                             </div>