follow Fitt's Law when dock is inFullJustify

--improvements in order to follow Fitt's Law when
the dock is in Justify mode and 100% maximum length

containment/package/contents/ui/applet/AppletItem.qml

@@ -63,6 +63,8 @@ Item {
     property bool isZoomed: false
     property bool isSeparator: applet && applet.pluginName === "audoban.applet.separator"
 
+    property bool firstChildOfStartLayout: (index === layoutsContainer.startLayout.beginIndex)
+    property bool lastChildOfEndLayout: ((index === layoutsContainer.endLayout.beginIndex+layoutsContainer.endLayout.count-1)&&(layoutsContainer.endLayout.count>1))
     //applet is in starting edge
     /*property bool startEdge: index < layoutsContainer.endLayout.beginIndex ? (index === 0)&&(layoutsContainer.mainLayout.count > 1) :
                                                                (index === layoutsContainer.endLayout.beginIndex)&&(layoutsContainer.endLayout.count > 1)*/

containment/package/contents/ui/applet/AppletItemWrapper.qml

@@ -111,10 +111,10 @@ Item{
 
     property int marginWidth: root.isVertical ?
                                   (applet && (applet.pluginName === "org.kde.plasma.systemtray") ? root.thickMarginBase : root.thickMargin ) :
-                                  root.iconMargin
+                                  (root.inFullJustify && (container.firstChildOfStartLayout || container.lastChildOfEndLayout ) ? 0 : root.iconMargin)  //Fitt's Law
     property int marginHeight: root.isHorizontal ?
                                    (applet && (applet.pluginName === "org.kde.plasma.systemtray") ? root.thickMarginBase : root.thickMargin ) :
-                                   root.iconMargin
+                                   (root.inFullJustify && (container.firstChildOfStartLayout || container.lastChildOfEndLayout ) ? 0 : root.iconMargin)  //Fitt's Law
 
     property real scaledWidth: zoomScaleWidth * (layoutWidth + marginWidth)
     property real scaledHeight: zoomScaleHeight * (layoutHeight + marginHeight)

containment/package/contents/ui/main.qml

@@ -85,6 +85,7 @@ DragDrop.DropArea {
 
     property bool immutable: plasmoid.immutable
     property bool indicateAudioStreams: plasmoid.configuration.indicateAudioStreams
+    property bool inFullJustify: (plasmoid.configuration.panelPosition === Latte.Dock.Justify) && (plasmoid.configuration.maxLength===100)
     property bool inStartup: true
     property bool isHalfShown: false //is used to disable the zoom hovering effect at sliding in-out the dock
     property bool isHorizontal: plasmoid.formFactor === PlasmaCore.Types.Horizontal
@@ -188,8 +189,8 @@ DragDrop.DropArea {
 
     //decouple iconMargin which now is used only for length calculations with thickMargins
     //which are used for thickness calculations
-    property int thickMarginBase: shrinkThickMargins ? 1 : Math.ceil(0.06 * iconSize)
-    property int thickMarginHigh: shrinkThickMargins ? 1 : Math.ceil(0.06 * iconSize)
+    property int thickMarginBase: shrinkThickMargins ? 0 : Math.ceil(0.06 * iconSize)
+    property int thickMarginHigh: shrinkThickMargins ? 0 : Math.ceil(0.06 * iconSize)
     property int thickMargin: thickMarginBase + thickMarginHigh
 
     //it is used in order to not break the calculations for the thickness placement