Save all documents before putting them into codescan (#3337)

Author: andrewyuq

jetbrains-core/src/software/aws/toolkits/jetbrains/services/codewhisperer/codescan/CodeWhispererCodeScanManager.kt

@@ -20,6 +20,7 @@ import com.intellij.openapi.editor.markup.HighlighterTargetArea
 import com.intellij.openapi.editor.markup.MarkupModel
 import com.intellij.openapi.fileEditor.FileDocumentManager
 import com.intellij.openapi.fileEditor.FileEditorManager
+import com.intellij.openapi.fileEditor.impl.FileDocumentManagerImpl
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.Disposer
 import com.intellij.openapi.util.TextRange
@@ -302,6 +303,7 @@ internal class CodeWhispererCodeScanManager(val project: Project) {
         addCodeScanUI(setSelected = true)
         // Show in progress indicator
         codeScanResultsPanel.showInProgressIndicator()
+        (FileDocumentManagerImpl.getInstance() as FileDocumentManagerImpl).saveAllDocuments(false)
         LOG.info { "Starting security scan on package ${project.name}..." }
     }