Reset allowed/blocked URLs between specs

* Prevents duplicates when using `before(:each)`
* Consistent with other settings

src/BlacklistedRequestHandler.cpp

@@ -50,3 +50,7 @@ bool BlacklistedRequestHandler::isBlacklisted(QUrl url) {
 void BlacklistedRequestHandler::blockUrl(const QString &url) {
   m_urlBlacklist.append(url);
 }
+
+void BlacklistedRequestHandler::reset() {
+  m_urlBlacklist.clear();
+}

src/BlacklistedRequestHandler.h

@@ -13,6 +13,7 @@ class BlacklistedRequestHandler : public RequestHandler {
     );
     void setUrlBlacklist(QStringList urlBlacklist);
     void blockUrl(const QString &);
+    void reset();
 
   private:
     RequestHandler *m_next;

src/UnknownUrlHandler.cpp

@@ -62,3 +62,7 @@ bool UnknownUrlHandler::isUnknown(QUrl url) {
 
   return true;
 }
+
+void UnknownUrlHandler::reset() {
+  m_allowedUrls.clear();
+}

src/UnknownUrlHandler.h

@@ -16,6 +16,7 @@ class UnknownUrlHandler : public RequestHandler {
     );
     void allowUrl(const QString &);
     void setMode(Mode);
+    void reset();
 
   private:
     QStringList m_allowedUrls;

src/WebPageManager.cpp

@@ -138,6 +138,8 @@ void WebPageManager::reset() {
   m_networkAccessManager->reset();
   m_customHeadersRequestHandler->reset();
   m_currentPage->resetLocalStorage();
+  m_blacklistedRequestHandler->reset();
+  m_unknownUrlHandler->reset();
   while (!m_pages.isEmpty()) {
     WebPage *page = m_pages.takeFirst();
     page->deleteLater();