Fix propagation of ignore list changes

Previously, when changing the ignore list, those changes would not be
propagated to existing sync folders. Only after restarting the client,
would these changes be applied.

Fixes: #8975

src/gui/folder.cpp

@@ -1134,8 +1134,12 @@ void Folder::slotScheduleThisFolder()
     FolderMan::instance()->scheduleFolder(this);
 }
 
-void Folder::slotNextSyncFullLocalDiscovery()
+void Folder::slotNextSyncFullLocalDiscovery(bool reloadExcludes)
 {
+    if (reloadExcludes) {
+        this->reloadExcludes();
+    }
+
     _timeSinceLastFullLocalDiscovery.invalidate();
 }
 

src/gui/folder.h

@@ -364,7 +364,7 @@ public slots:
     void implicitlyHydrateFile(const QString &relativepath);
 
     /** Ensures that the next sync performs a full local discovery. */
-    void slotNextSyncFullLocalDiscovery();
+    void slotNextSyncFullLocalDiscovery(bool reloadExcludes = false);
 
     /** Adds the path to the local discovery list
      *

src/gui/ignorelisteditor.cpp

@@ -121,7 +121,7 @@ void IgnoreListEditor::slotUpdateLocalIgnoreList()
     // ignored (because the remote etag did not change)   (issue #3172)
     for (auto *folder : folderMan->map()) {
         folder->journalDb()->forceRemoteDiscoveryNextSync();
-        folder->slotNextSyncFullLocalDiscovery();
+        folder->slotNextSyncFullLocalDiscovery(true); // ... but reload the excludes beforehand
         folderMan->scheduleFolder(folder);
     }
 }