Fix the emoticon editor looking visually broken

We need to set a minimum width/height here since the Image isn't
technically loaded, when creating a new one.

(cherry picked from commit 9f4146e5b1)

src/settings/EmoticonEditorPage.qml

@@ -39,6 +39,8 @@ FormCard.FormCardPage {
                 Image {
                     id: image
                     Layout.alignment: Qt.AlignRight
+                    Layout.minimumWidth: Kirigami.Units.gridUnit * 4
+                    Layout.minimumHeight: Kirigami.Units.gridUnit * 4
                     source: root.url
                     sourceSize.width: Kirigami.Units.gridUnit * 4
                     sourceSize.height: Kirigami.Units.gridUnit * 4