Shaders: path from root for easier maintenance + cleanup fallback icons

Modules/Background/Background.qml

@@ -139,7 +139,7 @@ Variants {
         property real screenWidth: width
         property real screenHeight: height
 
-        fragmentShader: Qt.resolvedUrl("../../Shaders/qsb/wp_fade.frag.qsb")
+        fragmentShader: Qt.resolvedUrl(Quickshell.shellDir + "/Shaders/qsb/wp_fade.frag.qsb")
       }
 
       // Wipe transition shader
@@ -164,7 +164,7 @@ Variants {
         property real screenWidth: width
         property real screenHeight: height
 
-        fragmentShader: Qt.resolvedUrl("../../Shaders/qsb/wp_wipe.frag.qsb")
+        fragmentShader: Qt.resolvedUrl(Quickshell.shellDir + "/Shaders/qsb/wp_wipe.frag.qsb")
       }
 
       // Disc reveal transition shader
@@ -191,7 +191,7 @@ Variants {
         property real screenWidth: width
         property real screenHeight: height
 
-        fragmentShader: Qt.resolvedUrl("../../Shaders/qsb/wp_disc.frag.qsb")
+        fragmentShader: Qt.resolvedUrl(Quickshell.shellDir + "/Shaders/qsb/wp_disc.frag.qsb")
       }
 
       // Diagonal stripes transition shader
@@ -218,7 +218,7 @@ Variants {
         property real screenWidth: width
         property real screenHeight: height
 
-        fragmentShader: Qt.resolvedUrl("../../Shaders/qsb/wp_stripes.frag.qsb")
+        fragmentShader: Qt.resolvedUrl(Quickshell.shellDir + "/Shaders/qsb/wp_stripes.frag.qsb")
       }
 
       // Animation for the transition progress

Modules/LockScreen/LockScreen.qml

@@ -728,7 +728,7 @@ Loader {
                 border.width: Math.max(1, Style.borderM * scaling)
 
                 NIcon {
-                   id: iconPower
+                  id: iconPower
                   anchors.centerIn: parent
                   icon: "power"
                   font.pointSize: Style.fontSizeXXXL * scaling

Modules/Notification/Notification.qml

@@ -205,14 +205,12 @@ Variants {
                 Layout.fillWidth: true
                 spacing: Style.marginM * scaling
 
-                // Avatar
+                // Image
                 NImageCircled {
-                  id: appAvatar
                   Layout.preferredWidth: 40 * scaling
                   Layout.preferredHeight: 40 * scaling
                   Layout.alignment: Qt.AlignTop
                   imagePath: model.image && model.image !== "" ? model.image : ""
-                  fallbackIcon: ""
                   borderColor: Color.transparent
                   borderWidth: 0
                   visible: (model.image && model.image !== "")