Add a checkbox to WatermarkController to convert the pdf to pdf-image (#1633)

* Add a checkbox to WatermarkController to convert the pdf to pdf-image

* 381: Fix messages_en_GB

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Co-authored-by: Anthony Stirling <77850077+Frooodle@users.noreply.github.com>

src/main/resources/messages_en_GB.properties

@@ -945,6 +945,7 @@ watermark.selectText.6=heightSpacer (Space between each watermark vertically):
 watermark.selectText.7=Opacity (0% - 100%):
 watermark.selectText.8=Watermark Type:
 watermark.selectText.9=Watermark Image:
+watermark.selectText.10=Convert PDF to PDF-Image
 watermark.submit=Add Watermark
 watermark.type.1=Text
 watermark.type.2=Image

src/main/resources/messages_en_US.properties

@@ -945,6 +945,7 @@ watermark.selectText.6=heightSpacer (Space between each watermark vertically):
 watermark.selectText.7=Opacity (0% - 100%):
 watermark.selectText.8=Watermark Type:
 watermark.selectText.9=Watermark Image:
+watermark.selectText.10=Convert PDF to PDF-Image
 watermark.submit=Add Watermark
 watermark.type.1=Text
 watermark.type.2=Image

src/main/resources/templates/security/add-watermark.html

@@ -104,6 +104,10 @@
                   <label for="heightSpacer" th:text="#{watermark.selectText.6}"></label>
                   <input type="text" id="heightSpacer" name="heightSpacer" class="form-control" value="50">
                 </div>
+                <div class="mb-3 form-check">
+                  <input type="checkbox" id="convertPDFToImage" name="convertPDFToImage">
+                  <label for="convertPDFToImage" th:text="#{watermark.selectText.10}"></label>
+                </div>
                 <div class="mb-3 text-center">
                   <input type="submit" id="submitBtn" th:value="#{watermark.submit}" class="btn btn-primary">
                 </div>