Allow immediate retry on partial data dir migration failure

A common cause of this on Windows will likely be open attachment files,
so suggest closing those and make retrying the default action.

chrome/content/zotero/xpcom/zotero.js

@@ -1528,7 +1528,8 @@ Components.utils.import("resource://gre/modules/osfile.jsm");
 		if (errors.length) {
 			let ps = Services.prompt;
 			let buttonFlags = (ps.BUTTON_POS_0) * (ps.BUTTON_TITLE_IS_STRING)
-				+ (ps.BUTTON_POS_1) * (ps.BUTTON_TITLE_IS_STRING);
+				+ (ps.BUTTON_POS_1) * (ps.BUTTON_TITLE_IS_STRING)
+				+ (ps.BUTTON_POS_2) * (ps.BUTTON_TITLE_IS_STRING);
 			let index = ps.confirmEx(null,
 				Zotero.getString('dataDir.migration.failure.title'),
 				Zotero.getString('dataDir.migration.failure.partial.text',
@@ -1538,13 +1539,17 @@ Components.utils.import("resource://gre/modules/osfile.jsm");
 					+ "\n\n"
 					+ Zotero.getString('dataDir.migration.failure.partial.new', newDir),
 				buttonFlags,
+				Zotero.getString('general.tryAgain'),
+				Zotero.getString('general.tryLater'),
 				Zotero.getString('dataDir.migration.failure.partial.showDirectoriesAndQuit', Zotero.appName),
-				Zotero.getString('general.notNow'),
+				null, {}
-				null, null, {}
 			);
 			
-			// Focus the first file/folder in the old directory
 			if (index == 0) {
+				return this.checkForDataDirectoryMigration(newDir, newDir);
+			}
+			// Focus the first file/folder in the old directory
+			else if (index == 2) {
 				try {
 					let it = new OS.File.DirectoryIterator(oldDir);
 					let entry;

chrome/locale/en-US/zotero/zotero.properties

@@ -57,6 +57,8 @@ general.keys.ctrlShift				= Ctrl+Shift+
 general.keys.cmdShift				= Cmd+Shift+
 general.dontShowAgain = Don’t Show Again
 general.fix                      = Fix…
+general.tryAgain                 = Try Again
+general.tryLater                 = Try Later
 
 general.operationInProgress = A Zotero operation is currently in progress.
 general.operationInProgress.waitUntilFinished = Please wait until it has finished.
@@ -134,15 +136,15 @@ dataDir.incompatibleDbVersion.title		= Incompatible Database Version
 dataDir.incompatibleDbVersion.text		= The currently selected data directory is not compatible with Zotero Standalone, which can share a database only with Zotero for Firefox 2.1b3 or later.\n\nUpgrade to the latest version of Zotero for Firefox first or select a different data directory for use with Zotero Standalone.
 dataDir.migration.inProgress                               = Migration in progress — do not interrupt…
 dataDir.migration.failure.title                            = Data Directory Migration Error
-dataDir.migration.failure.partial.text                     = Some files in your old %1$S data directory could not be transferred to the new location. You should close %2$S and attempt to move the remaining files manually.
+dataDir.migration.failure.partial.text                     = Some files in your old %1$S data directory could not be transferred to the new location. Close any open attachment files and try again. You can also quit %2$S and attempt to move the remaining files manually.
 dataDir.migration.failure.partial.old                      = Old directory: %S
 dataDir.migration.failure.partial.new                      = New directory: %S
-dataDir.migration.failure.partial.showDirectoriesAndQuit   = Show Directories and Quit %S
+dataDir.migration.failure.partial.showDirectoriesAndQuit   = Show Directories and Quit
 dataDir.migration.failure.full.text1                       = Your data directory could not be migrated.
 dataDir.migration.failure.full.text2                       = It is recommended that you close %S and manually move your data directory to the new default location.
 dataDir.migration.failure.full.current                     = Current location: %S
 dataDir.migration.failure.full.recommended                 = Recommended location: %S
-dataDir.migration.failure.full.showCurrentDirectoryAndQuit = Show Current Directory and Quit %S
+dataDir.migration.failure.full.showCurrentDirectoryAndQuit = Show Current Directory and Quit
 
 app.standalone					= Zotero Standalone
 app.firefox						= Zotero for Firefox

test/tests/zoteroTest.js

@@ -158,11 +158,14 @@ describe("Zotero Core Functions", function () {
 			let stub4 = sinon.stub(Zotero.File, "reveal").returns(Zotero.Promise.resolve());
 			let stub5 = sinon.stub(Zotero.Utilities.Internal, "quitZotero");
 			
-			var promise = waitForDialog();
+			var promise2;
+			// Click "Try Again" the first time, and then "Show Directories and Quit Zotero"
+			var promise = waitForDialog(function () {
+				promise2 = waitForDialog(null, 'extra1');
+			});
 			yield Zotero.checkForDataDirectoryMigration(oldDir, newDir);
-			Zotero.debug("Waiting for dialog");
 			yield promise;
-			Zotero.debug("Done waiting for dialog");
+			yield promise2;
 			
 			assert.isTrue(stub4.calledTwice);
 			assert.isTrue(stub4.getCall(0).calledWith(oldStorageDir));