better naming for troubleshooting page (#99)

Troubleshooting.md

@@ -1,4 +1,4 @@
-# FAQs
+# Troubleshooting
 
 ## Requirements
 Please make sure Maven is either in the `PATH`, or that `maven.executable.path` is pointed to its installed location. Also make sure `JAVA_HOME` is specified either in environment variables or settings.
@@ -13,6 +13,7 @@ If you do not want to add it into `PATH`, you can specify maven executable path
     ```
 
 #### Possible error messages
+Error message can be collected either **directly from the integrated terminal**, or **from `Maven for Java` output panel**.
 * Maven executable file not found/set.
     ```
     Command failed: mvn --version 'mvn' is not recognized as an internal or external command, operable program or batch file.

src/extension.ts

@@ -127,13 +127,13 @@ async function checkMavenAvailablility(): Promise<void> {
             }
         }
         if (Object.keys(errors).length > 0) {
-            const OPTION_SHOW_FAQS: string = "Show FAQs";
+            const OPTION_LEARN_MORE: string = "Learn more";
             const OPTION_OPEN_SETTINGS: string = "Open Settings";
             const errorMessage: string = `Unable to execute Maven commands for workspace folder [${Object.keys(errors).join(", ")}], please check your settings.`;
-            const choiceForDetails: string = await vscode.window.showErrorMessage(errorMessage, OPTION_OPEN_SETTINGS, OPTION_SHOW_FAQS);
-            if (choiceForDetails === OPTION_SHOW_FAQS) {
+            const choiceForDetails: string = await vscode.window.showErrorMessage(errorMessage, OPTION_OPEN_SETTINGS, OPTION_LEARN_MORE);
+            if (choiceForDetails === OPTION_LEARN_MORE) {
                 // open FAQs
-                const readmeFilePath: string = Utils.getPathToExtensionRoot("FAQs.md");
+                const readmeFilePath: string = Utils.getPathToExtensionRoot("Troubleshooting.md");
                 vscode.commands.executeCommand("markdown.showPreview", vscode.Uri.file(readmeFilePath));
             } else if (choiceForDetails === OPTION_OPEN_SETTINGS) {
                 vscode.commands.executeCommand("workbench.action.openSettings");