fix margin of VToolBox

src/vexplorer.cpp

@@ -244,7 +244,7 @@ void VExplorer::setupUI()
     mainLayout->addWidget(m_imgFolderEdit);
     mainLayout->addLayout(btnLayout);
     mainLayout->addWidget(m_tree);
-    mainLayout->setContentsMargins(3, 0, 3, 0);
+    mainLayout->setContentsMargins(0, 0, 0, 0);
 
     setLayout(mainLayout);
 }

src/vhistorylist.cpp

@@ -77,7 +77,7 @@ void VHistoryList::setupUI()
     QVBoxLayout *mainLayout = new QVBoxLayout();
     mainLayout->addLayout(btnLayout);
     mainLayout->addWidget(m_itemList);
-    mainLayout->setContentsMargins(3, 0, 3, 0);
+    mainLayout->setContentsMargins(0, 0, 0, 0);
 
     setLayout(mainLayout);
 }

src/vmainwindow.cpp

@@ -303,6 +303,7 @@ void VMainWindow::setupUI()
 void VMainWindow::setupNaviBox()
 {
     m_naviBox = new VToolBox();
+    m_naviBox->setObjectName("MainToolBox");
 
     setupNotebookPanel();
     m_naviBox->addItem(m_nbSplitter,

src/vtoolbox.cpp

@@ -35,7 +35,8 @@ void VToolBox::setupUI()
     QVBoxLayout *mainLayout = new QVBoxLayout();
     mainLayout->addWidget(wid);
     mainLayout->addLayout(m_widgetLayout);
-    mainLayout->setContentsMargins(0, 0, 0, 0);
+    int margin = 2 * VUtils::calculateScaleFactor();
+    mainLayout->setContentsMargins(margin, 0, margin, 0);
 
     setLayout(mainLayout);
 }