add follow_to_index argument

src/browser/main/tab/page.rs

@@ -127,13 +127,13 @@ impl Page {
     }
 
     pub fn navigation_history_back(&self) {
-        if let Some(url) = self.navigation.history_back() {
+        if let Some(url) = self.navigation.history_back(true) {
             self.action_page_open.activate(Some(&url.to_variant()));
         }
     }
 
     pub fn navigation_history_forward(&self) {
-        if let Some(url) = self.navigation.history_forward() {
+        if let Some(url) = self.navigation.history_forward(true) {
             self.action_page_open.activate(Some(&url.to_variant()));
         }
     }

src/browser/main/tab/page/navigation.rs

@@ -89,12 +89,12 @@ impl Navigation {
         self.history.add(request, true);
     }
 
-    pub fn history_back(&self) -> Option<GString> {
-        self.history.back(true)
+    pub fn history_back(&self, follow_to_index: bool) -> Option<GString> {
+        self.history.back(follow_to_index)
     }
 
-    pub fn history_forward(&self) -> Option<GString> {
-        self.history.forward(true)
+    pub fn history_forward(&self, follow_to_index: bool) -> Option<GString> {
+        self.history.forward(follow_to_index)
     }
 
     pub fn update(&self, progress_fraction: Option<f64>) {