Use original icon names

Gui/Navigation.qml

@@ -17,7 +17,7 @@ ColumnLayout {
         id: dashBoard
 
         ButtonGroup.group: buttonBar
-        icon.source: "qrc:/images/dash.svg"
+        icon.source: "qrc:/images/Square3Stack3D-Outline.svg"
         text: qsTr("Dashboard")
         target: "/Gui/Dashboard.qml"
     }
@@ -25,7 +25,7 @@ ColumnLayout {
         id: kunden
 
         ButtonGroup.group: buttonBar
-        icon.source: "qrc:/images/customer.svg"
+        icon.source: "qrc:/images/UserGroup-Outline.svg"
         text: qsTr("Kunden")
         target: "/Gui/CustomersTable.qml"
     }
@@ -33,7 +33,7 @@ ColumnLayout {
         id: objekt
 
         ButtonGroup.group: buttonBar
-        icon.source: "qrc:/images/object.svg"
+        icon.source: "qrc:/images/BuildingOffice2-Outline.svg"
         text: qsTr("Objekt")
         target: "/Gui/ObjectsTable.qml"
     }
@@ -41,7 +41,7 @@ ColumnLayout {
         id: mitarbeiter
 
         ButtonGroup.group: buttonBar
-        icon.source: "qrc:/images/employee.svg"
+        icon.source: "qrc:/images/Identification-Outline.svg"
         text: qsTr("Mitarbeiter")
         target: "/Gui/Employees/EmployeesTable.qml"
     }
@@ -49,7 +49,7 @@ ColumnLayout {
         id: offers
 
         ButtonGroup.group: buttonBar
-        icon.source: "qrc:/images/offer.svg"
+        icon.source: "qrc:/images/RectangleStack-Outline.svg"
         text: qsTr("Angebote")
         target: "/Gui/OffersTable.qml"
     }
@@ -57,7 +57,7 @@ ColumnLayout {
         id: abrechnung
 
         ButtonGroup.group: buttonBar
-        icon.source: "qrc:/images/invoice.svg"
+        icon.source: "qrc:/images/Wallet-Outline.svg"
         text: qsTr("Abrechnung")
     }
     Item {