Rename some filers and folder for clarity

src/gui/Base/HMenu.qml

@@ -0,0 +1,31 @@
+import QtQuick 2.12
+import QtQuick.Controls 2.12
+
+Menu {
+    id: menu
+    padding: theme.controls.menu.borderWidth
+
+    implicitWidth: {
+        let result = 0
+
+        for (let i = 0; i < count; ++i) {
+            let item = itemAt(i)
+            if (! item.visible) continue
+
+            result = Math.max(item.implicitWidth, result)
+        }
+        return Math.min(result + menu.padding * 2, window.width)
+    }
+
+    background: Rectangle {
+        color: theme.controls.menu.background
+        border.color: theme.controls.menu.border
+        border.width: theme.controls.menu.borderWidth
+    }
+
+    onAboutToShow: previouslyFocused = window.activeFocusItem
+    onClosed: if (previouslyFocused) previouslyFocused.forceActiveFocus()
+
+
+    property var previouslyFocused: null
+}