Add the missing method setBlacklist(const QStringList&)

On top of that, make nextPostPage() Q_INVOKABLE so it can be used from
QML.

src/libdanbooru/danbooruservice.cpp

@@ -523,6 +523,21 @@ void DanbooruService::setBlacklist(const QSet< QString > &blacklist)
 
 }
 
+void DanbooruService::setBlacklist(const QStringList &blacklist)
+{
+
+    if (blacklist.isEmpty()) {
+        return;
+    }
+
+    m_blacklist.clear();
+
+    for (auto element : blacklist) {
+        m_blacklist.insert(element);
+    }
+
+}
+
 void DanbooruService::setBoardUrl(const QUrl& url)
 {
     m_url = url;

src/libdanbooru/danbooruservice.h

@@ -198,7 +198,7 @@ public:
      **/
     int maxPosts() const;
 
-    void nextPostPage();
+    Q_INVOKABLE void nextPostPage();
 
     QStringList postTags() const;
 
@@ -210,6 +210,15 @@ public:
      * @param blacklist A QSet<QString> including unwanted tags.
      * @return void
      */
+    void setBlacklist(const QStringList& blacklist);
+
+     /**
+     * @brief Set the tag blacklist.
+     *
+     * If a tag is in the blacklist, posts tagged with it will not be downloaded.
+     *
+     **/
+
     void setBlacklist(const QSet<QString>& blacklist);
 
     /**
@@ -221,13 +230,7 @@ public:
      **/
     void setMaximumAllowedRating(DanbooruPost::Rating rating);
 
-    /**
+
-     * @brief Set the tag blacklist.
-     *
-     * If a tag is in the blacklist, posts tagged with it will not be downloaded.
-     *
-     **/
-    void setBlackList(QStringList blacklist);
 
 
     /**