fix: empty array exception

Author: BFergerson

plugin/src/main/kotlin/spp/jetbrains/sourcemarker/view/LiveViewChartManagerImpl.kt

@@ -90,7 +90,7 @@ class LiveViewChartManagerImpl(
         project.messageBus.connect().subscribe(ToolWindowManagerListener.TOPIC, object : ToolWindowManagerListener {
             override fun stateChanged(toolWindowManager: ToolWindowManager) {
                 if (toolWindow.isVisible) {
-                    (contentManager.contents.first().disposer as ResumableView).onFocused()
+                    (contentManager.contents.firstOrNull()?.disposer as? ResumableView)?.onFocused()
                 } else {
                     //pause views when tool window is hidden
                     contentManager.contents

plugin/src/main/kotlin/spp/jetbrains/sourcemarker/view/LiveViewLogManagerImpl.kt

@@ -90,7 +90,7 @@ class LiveViewLogManagerImpl(
         project.messageBus.connect().subscribe(ToolWindowManagerListener.TOPIC, object : ToolWindowManagerListener {
             override fun stateChanged(toolWindowManager: ToolWindowManager) {
                 if (toolWindow.isVisible) {
-                    (contentManager.contents.first().disposer as ResumableView).onFocused()
+                    (contentManager.contents.firstOrNull()?.disposer as? ResumableView)?.onFocused()
                 } else {
                     //pause views when tool window is hidden
                     contentManager.contents

plugin/src/main/kotlin/spp/jetbrains/sourcemarker/view/LiveViewTraceManagerImpl.kt

@@ -94,7 +94,7 @@ class LiveViewTraceManagerImpl(
         project.messageBus.connect().subscribe(ToolWindowManagerListener.TOPIC, object : ToolWindowManagerListener {
             override fun stateChanged(toolWindowManager: ToolWindowManager) {
                 if (toolWindow.isVisible) {
-                    (contentManager.contents.first().disposer as ResumableView).onFocused()
+                    (contentManager.contents.firstOrNull()?.disposer as? ResumableView)?.onFocused()
                 } else {
                     //pause views when tool window is hidden
                     contentManager.contents