Save/load sidePane manually-set width

src/python/config_files.py

@@ -101,4 +101,5 @@ class UIState(JSONConfigFile):
         return {
             "page":                "Pages/Default.qml",
             "pageProperties":      {},
+            "sidePaneManualWidth": None,
         }

src/qml/SidePane/SidePane.qml

@@ -16,6 +16,18 @@ HRectangle {
     property bool manuallyResized: false
     property int manualWidth: 0
 
+    Component.onCompleted: {
+        if (window.uiState.sidePaneManualWidth) {
+            manualWidth     = window.uiState.sidePaneManualWidth
+            manuallyResized = true
+        }
+    }
+
+    onManualWidthChanged: {
+        window.uiState.sidePaneManualWidth = manualWidth
+        window.uiStateChanged()
+    }
+
     property int maximumCalculatedWidth: Math.min(
         manuallyResized ? manualWidth : theme.sidePane.maximumAutoWidth,
         window.width - theme.minimumSupportedWidthPlusSpacing