gui, lib/config: Add notification about new release channels

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3945

gui/default/assets/lang/lang-en.json

@@ -22,6 +22,7 @@
    "An external command handles the versioning. It has to remove the file from the synced folder.": "An external command handles the versioning. It has to remove the file from the synced folder.",
    "Anonymous Usage Reporting": "Anonymous Usage Reporting",
    "Any devices configured on an introducer device will be added to this device as well.": "Any devices configured on an introducer device will be added to this device as well.",
+   "Automatic upgrade now offers the choice between stable releases and release candidates.": "Automatic upgrade now offers the choice between stable releases and release candidates.",
    "Automatic upgrades": "Automatic upgrades",
    "Be careful!": "Be careful!",
    "Bugs": "Bugs",
@@ -104,6 +105,7 @@
    "Last seen": "Last seen",
    "Later": "Later",
    "Latest Change": "Latest Change",
+   "Learn more": "Learn more",
    "Listeners": "Listeners",
    "Local Discovery": "Local Discovery",
    "Local State": "Local State",
@@ -148,6 +150,7 @@
    "Random": "Random",
    "Reduced by ignore patterns": "Reduced by ignore patterns",
    "Release Notes": "Release Notes",
+   "Release candidates contain the latest features and fixes. They are similar to the traditional bi-weekly Syncthing releases.": "Release candidates contain the latest features and fixes. They are similar to the traditional bi-weekly Syncthing releases.",
    "Remote Devices": "Remote Devices",
    "Remove": "Remove",
    "Required identifier for the folder. Must be the same on all cluster devices.": "Required identifier for the folder. Must be the same on all cluster devices.",
@@ -184,6 +187,7 @@
    "Smallest First": "Smallest First",
    "Source Code": "Source Code",
    "Stable releases and release candidates": "Stable releases and release candidates",
+   "Stable releases are delayed by about two weeks. During this time they go through testing as release candidates.": "Stable releases are delayed by about two weeks. During this time they go through testing as release candidates.",
    "Stable releases only": "Stable releases only",
    "Staggered File Versioning": "Staggered File Versioning",
    "Start Browser": "Start Browser",
@@ -250,6 +254,8 @@
    "When adding a new device, keep in mind that this device must be added on the other side too.": "When adding a new device, keep in mind that this device must be added on the other side too.",
    "When adding a new folder, keep in mind that the Folder ID is used to tie folders together between devices. They are case sensitive and must match exactly between all devices.": "When adding a new folder, keep in mind that the Folder ID is used to tie folders together between devices. They are case sensitive and must match exactly between all devices.",
    "Yes": "Yes",
+   "You can change your choice at any time in the Settings dialog.": "You can change your choice at any time in the Settings dialog.",
+   "You can read more about the two release channels at the link below.": "You can read more about the two release channels at the link below.",
    "You must keep at least one version.": "You must keep at least one version.",
    "days": "days",
    "directories": "directories",

gui/default/syncthing/core/notifications.html

@@ -14,3 +14,30 @@
   </div>
 </notification>
 -->
+
+<notification id="channelNotification">
+  <div class="panel panel-success">
+    <div class="panel-heading">
+      <h3 class="panel-title"><span class="fa fa-flash"></span>&nbsp;<span translate>Automatic upgrades</span></h3>
+    </div>
+    <div class="panel-body">
+      <p translate>Automatic upgrade now offers the choice between stable releases and release candidates.</p>
+      <p>
+      <span translate>Release candidates contain the latest features and fixes. They are similar to the traditional bi-weekly Syncthing releases.</span>
+      <span translate>Stable releases are delayed by about two weeks. During this time they go through testing as release candidates.</span>
+      <span translate>You can read more about the two release channels at the link below.</span>
+      </p>
+      <p translate>You can change your choice at any time in the Settings dialog.</p>
+      <p><a href="https://docs.syncthing.net/users/releases.html"><span class="fa fa-fw fa-book"></span>&nbsp;<span translate>Learn more</span></a></p>
+    </div>
+    <div class="panel-footer">
+      <button type="button" class="btn btn-sm btn-default pull-right" ng-click="editSettings()">
+        <span class="fa fa-cog"></span>&nbsp;<span translate>Settings</span>
+      </button>
+      <button type="button" class="btn btn-sm btn-default" ng-click="dismiss()">
+        <span class="fa fa-check"></span>&nbsp;<span translate>OK</span>
+      </button>
+      <div class="clearfix"></div>
+    </div>
+  </div>
+</notification>