Grocycode, label printing (#1500)

* Grocycode: Productpicker, StockService

* Grocycode: Datamatrix generation

* Grocycode: Display in UI, make Images downloadable

* Grocycode: Do not show on product card

* Grocycode: Stockentry Label view

* Grocycode: Webhooks & Labelprinter Feature

* Grocycode: Manual Label printing

* Grocycode: Print Label from product form

* Quagga2: use zxing for DataMatrix recognition

* Grocycode: Default settings for label printing

* Prepare merge of master

* Grocycode: docs

* Docs: label printing webhook

* Review

- "grocy" is currently written lower-case everywhere, so let's do this also for "grocycode"
- Unified phrases / capitalization
- Minor UI adjustments (mainly context menu item ordering / ordering/spacing on product edit page)
- Documented API changes for Swagger UI (grocy.openapi.json)
- Reverted German localizations (those are managed via Transifex; would cause conflicts when manually edited - will import them later there)
- Reverted a somehow messed up localization string (productform/help text for `cumulate_min_stock_amount_of_sub_products`)
- Suppress deprecation warnings when generating Datamatrix PNG (otherwise the PNG is invalid, https://github.com/jucksearm/php-barcode/issues/3)
- Default `FEATURE_FLAG_LABELPRINTER` to disabled

Co-authored-by: Bernd Bestel <bernd@berrnd.de>

public/viewjs/stockentries.js

@@ -124,6 +124,21 @@ $(document).on("click", ".stock-name-cell", function(e)
 	$("#stockentry-productcard-modal").modal("show");
 });
 
+$(document).on('click', '.stockentry-grocycode-stockentry-label-print', function(e)
+{
+	e.preventDefault();
+	document.activeElement.blur();
+
+	var stockId = $(e.currentTarget).attr('data-stock-id');
+	Grocy.Api.Get('stock/entry/' + stockId + '/printlabel', function(labelData)
+	{
+		if (Grocy.Webhooks.labelprinter !== undefined)
+		{
+			Grocy.FrontendHelpers.RunWebhook(Grocy.Webhooks.labelprinter, labelData);
+		}
+	});
+});
+
 function RefreshStockEntryRow(stockRowId)
 {
 	Grocy.Api.Get("stock/entry/" + stockRowId,