fix rendering of form fields in PDF output

fixes #2004 and #2005 and #2819

CHANGELOG.md

@@ -3,6 +3,7 @@ v0.12.4 (unreleased)
 * update OpenSSL to 1.0.2g
 * **[qt]** change screen size in headless mode to a more sane value (1366x768)
 * **[qt]** fix compilation failure on OS X 10.11 due to usage of deprecated APIs
+* **#2004**: **[qt]** fix rendering of form fields in PDF output
 * **#2416**: make background transparent by default for headers/footers
 * **#2673**: fail immediately in the build script if the Qt source is not available
 * **#2885**: enforce UTF-8 encoding for input strings in the API

qt

@@ -1 +1 @@
-Subproject commit 6f025714379c0c004395fcde47396780b84716e3
+Subproject commit c6e2d6b4a84bfb28a9aa2d45f7d1de4e92281e95