add Communicator::lengthMarginsEnabled for applets

--applets can now inform Latte if they want length
margins or not

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

@@ -35,7 +35,7 @@ Item{
     property int separatorSpace: neighbourSeparator && !appletItem.isSeparator && !appletItem.latteApplet && root.zoomFactor>1 ? (2+root.lengthMargin) : 0
 
     property real nHiddenSize: {
-        if (isSeparator || isSpacer) {
+        if (isSeparator || !communicator.lengthMarginsEnabled) {
             return 0;
         }
 

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

@@ -122,7 +122,7 @@ Item{
                                    root.thickMargins :
                                    (root.inFullJustify && atScreenEdge ? 0 : localLengthMargins)  //Fitt's Law
 
-    property int localLengthMargins: isSpacer || isSeparator ? 0 : root.lengthMargins
+    property int localLengthMargins: isSeparator || !communicator.lengthMarginsEnabled ? 0 : root.lengthMargins
 
     property real scaledWidth: zoomScaleWidth * (layoutWidth + marginWidth)
     property real scaledHeight: zoomScaleHeight * (layoutHeight + marginHeight)

containment/package/contents/ui/applet/communicator/Actions.qml

@@ -51,6 +51,14 @@ Item{
     //       or used for that applet.
     // @since: 0.9
 
+    // NAME: lengthMarginsEnabled
+    // TYPE: bool
+    //   USAGE: writable through actions.setProperty
+    //   EXPLANATION: when is TRUE, all length margins are drawn including
+    //       indicator padding and applets distance. For FALSE, length margins
+    //       are not drawn at all.
+    // @since: 0.9
+
     // NAME: parabolicEffectEnabled
     // TYPE: bool
     //   USAGE: writable through actions.setProperty
@@ -74,6 +82,8 @@ Item{
             mainCommunicator.latteIconOverlayEnabled = value;
         } else if (parameter === "activeIndicatorEnabled") {
             mainCommunicator.activeIndicatorEnabled = value;
+        } else if (parameter === "lengthMarginsEnabled") {
+           mainCommunicator.lengthMarginsEnabled = value;
         } else if (parameter === "parabolicEffectLocked") {
             mainCommunicator.parabolicEffectLocked = value;
         } else if (parameter === "windowsTrackingEnabled") {
@@ -88,6 +98,8 @@ Item{
             return mainCommunicator.latteIconOverlayEnabled;
         } else if (parameter === "activeIndicatorEnabled") {
             return mainCommunicator.activeIndicatorEnabled;
+        } else if (parameter === "lengthMarginsEnabled") {
+            return mainCommunicator.lengthMarginsEnabled;
         } else if (parameter === "parabolicEffectLocked") {
             return mainCommunicator.parabolicEffectLocked;
         } else if (parameter === "windowsTrackingEnabled") {

containment/package/contents/ui/applet/communicator/Engine.qml

@@ -53,6 +53,7 @@ Item{
     property bool latteSideColoringEnabled: true
     property bool latteIconOverlayEnabled: true
     property bool activeIndicatorEnabled: true
+    property bool lengthMarginsEnabled: true
     property bool windowsTrackingEnabled: false
     property bool parabolicEffectLocked: false
     //! END OF PUBLIC PROPERTIES SET THROUGH LATTEBRIDGE.ACTIONS