Initialize alignment offset to 0. (it was undefined). Also handle a s…

…mall bug with swimlane configuration not getting replaced when the plan used by a gantt chart was changed

src/plugins/plan/components/PlanView.vue

@@ -248,6 +248,7 @@ export default {
       }
     },
     handleConfigurationChange(newConfiguration) {
+      this.configuration = this.planViewConfiguration.getConfiguration();
       Object.keys(newConfiguration).forEach((key) => {
         this[key] = newConfiguration[key];
       });

src/ui/components/TimeSystemAxis.vue

@@ -79,6 +79,7 @@ export default {
     const svgWidth = ref(0);
     const svgHeight = ref(0);
     const axisTransform = ref('translate(0,20)');
+    const alignmentOffset = ref(0);
     const nowMarkerStyle = reactive({
       height: '0px',
       left: '0px'
@@ -100,6 +101,7 @@ export default {
       svgWidth,
       svgHeight,
       axisTransform,
+      alignmentOffset,
       nowMarkerStyle,
       openmct
     };