[polari] Replace GtkSpinner:active with :spinning

[Marge Bot <marge-bot src gnome org>]

commit ada740fcce1771c62e74b4bbff7d757fecc9e195
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Sep 26 00:41:57 2020 +0200

    Replace GtkSpinner:active with :spinning
    
    GTK4 simply renamed the property.
    
    Part-of: <https://gitlab.gnome.org/GNOME/polari/-/merge_requests/228>

 data/resources/entry-area.ui | 1 -
 src/roomList.js              | 6 +++---
 src/serverRoomManager.js     | 2 +-
 3 files changed, 4 insertions(+), 5 deletions(-)
---
diff --git a/data/resources/entry-area.ui b/data/resources/entry-area.ui
index dd0c33ef..d985e584 100644
--- a/data/resources/entry-area.ui
+++ b/data/resources/entry-area.ui
@@ -65,7 +65,6 @@
         <child>
           <object class="GtkSpinner" id="uploadSpinner">
             <property name="visible">True</property>
-            <property name="active">False</property>
           </object>
         </child>
         <child>
diff --git a/src/roomList.js b/src/roomList.js
index f2151ae5..0b45ea27 100644
--- a/src/roomList.js
+++ b/src/roomList.js
@@ -442,7 +442,7 @@ const RoomListHeader = GObject.registerClass({
         else if (status === Tp.ConnectionStatus.DISCONNECTED)
             child = 'disconnected';
 
-        if (isError && this._spinner.active) {
+        if (isError && this._spinner.spinning) {
             let spinnerTime = GLib.get_monotonic_time() - this._spinnerActivationTime;
             if (spinnerTime < MIN_SPINNER_TIME) {
                 GLib.timeout_add(GLib.PRIORITY_DEFAULT, (MIN_SPINNER_TIME - spinnerTime) / 1000, () => {
@@ -454,10 +454,10 @@ const RoomListHeader = GObject.registerClass({
         }
 
         this._iconStack.visible_child_name = child;
-        this._spinner.active = child === 'connecting';
+        this._spinner.spinning = child === 'connecting';
         this._popoverTitle.visible = !isAuth;
 
-        if (this._spinner.active)
+        if (this._spinner.spinning)
             this._spinnerActivationTime = GLib.get_monotonic_time();
 
         this._popoverTitle.use_markup = isError;
diff --git a/src/serverRoomManager.js b/src/serverRoomManager.js
index 35587701..88e342dd 100644
--- a/src/serverRoomManager.js
+++ b/src/serverRoomManager.js
@@ -359,7 +359,7 @@ export const ServerRoomList = GObject.registerClass({
     _checkSpinner() {
         let loading = this._pendingInfos.length ||
                       this._account && this._manager.isLoading(this._account);
-        this._spinner.active = loading;
+        this._spinner.spinning = loading;
     }
 
     _toggleChecked(path) {