Some applet sizing fixes

This MR fixes some applet sizing regressions that were recently occurred.

Before	After

Note that this MR does not contain the red borders. If you want to show them for debug please manually add this code to the applet container:

                Rectangle {
                    border.color: "red"
                    border.width: 1
                    color: "transparent"

                    anchors {
                        fill: parent
                        topMargin: -parent.Layout.topMargin
                        bottomMargin: -parent.Layout.bottomMargin
                        leftMargin: -parent.Layout.leftMargin
                        rightMargin: -parent.Layout.rightMargin
                    }
                }

CC @niccolove