Add setting to limit number of historical messages to load on connect (#2252)

src/widgets/settingspages/GeneralPageView.cpp

@@ -189,6 +189,43 @@ ColorButton *GeneralPageView::addColorButton(
     return colorButton;
 }
 
+QSpinBox *GeneralPageView::addIntInput(const QString &text, IntSetting &setting,
+                                       int min, int max, int step)
+{
+    auto layout = new QHBoxLayout;
+
+    auto label = new QLabel(text + ":");
+
+    auto input = new QSpinBox;
+    input->setMinimum(min);
+    input->setMaximum(max);
+
+    // update when setting changes
+    setting.connect(
+        [input](const int &value, auto) {
+            input->setValue(value);
+        },
+        this->managedConnections_);
+
+    // update setting on value changed
+    QObject::connect(input, QOverload<int>::of(&QSpinBox::valueChanged), this,
+                     [&setting](int newValue) {
+                         setting = newValue;
+                     });
+
+    layout->addWidget(label);
+    layout->addStretch(1);
+    layout->addWidget(input);
+
+    this->addLayout(layout);
+
+    // groups
+    this->groups_.back().widgets.push_back({input, {text}});
+    this->groups_.back().widgets.push_back({label, {text}});
+
+    return input;
+}
+
 void GeneralPageView::addNavigationSpacing()
 {
     this->navigationLayout_->addSpacing(24);