fix(ui/editor): Flyout 弹窗位置乱跳

Author: RinLit-233-shiroko

src/qml/ClassWidgets/Components/editor/EntryDetailView.qml

@@ -196,7 +196,7 @@ Flyout {
                 Flyout {
                     id: subjectsFlyout
                     position: Position.Left
-                    width: 300
+                    implicitWidth: 300
 
                     Flow {
                         Layout.fillWidth: true

src/qml/ClassWidgets/Components/editor/ScheduleFlyout.qml

@@ -66,7 +66,7 @@ Flyout {
 
                 Flyout {
                     id: subjectsFlyout
-                    width: 300
+                    implicitWidth: 300
                     position: Position.Left
                     Flow {
                         Layout.fillWidth: true