update translations for 7.4/master

and force-fix errors using pocheck

Change-Id: I0ae7f1a2496b0deeaabe0518f4895c89c953e0c6

source/cy/filter/messages.po

@@ -4,7 +4,7 @@ msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: https://bugs.libreoffice.org/enter_bug.cgi?product=LibreOffice&bug_status=UNCONFIRMED&component=UI\n"
 "POT-Creation-Date: 2022-06-15 22:28+0200\n"
-"PO-Revision-Date: 2022-02-02 13:39+0000\n"
+"PO-Revision-Date: 2022-07-04 16:15+0000\n"
 "Last-Translator: Rhoslyn Prys <rprys@yahoo.com>\n"
 "Language-Team: Welsh <https://translations.documentfoundation.org/projects/libo_ui-master/filtermessages/cy/>\n"
 "Language: cy\n"
@@ -13,7 +13,7 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=2; plural=(n==2) ? 1 : 0;\n"
 "X-Accelerator-Marker: ~\n"
-"X-Generator: LibreOffice\n"
+"X-Generator: Weblate 4.12.2\n"
 "X-POOTLE-MTIME: 1565696242.000000\n"
 
 #. 5AQgJ
@@ -1516,7 +1516,7 @@ msgstr "Ffitio'r _gweladwy"
 #: filter/uiconfig/ui/pdfviewpage.ui:254
 msgctxt "pdfviewpage|extended_tip|fitvis"
 msgid "Select to generate a PDF file that shows the text and graphics on the page zoomed to fit the reader's window."
-msgstr ""
+msgstr "Dewiswch i gynhyrchu ffeil PDF sy'n dangos y testun a'r graffigau ar y dudalen weddi eu chwyddo i ffitio ffenestr y darllenydd."
 
 #. NGpWy
 #: filter/uiconfig/ui/pdfviewpage.ui:271
@@ -1918,7 +1918,7 @@ msgstr "Rhowch yr enw rydych chi am ei dangos ym mlwch rhestr y dialog Gosodiada
 #: filter/uiconfig/ui/xmlfiltertabpagegeneral.ui:119
 msgctxt "xmlfiltertabpagegeneral|extended_tip|extension"
 msgid "Enter the file extension to use when you open a file without specifying a filter. The file extension is used to determine which filter to use."
-msgstr ""
+msgstr "Rhowch yr estyniad ffeil i'w ddefnyddio pan fyddwch yn agor ffeil heb nodi hidlydd. Mae'r estyniad ffeil yn cael ei ddefnyddio i benderfynu pa hidl i'w ddefnyddio."
 
 #. fZvBA
 #: filter/uiconfig/ui/xmlfiltertabpagegeneral.ui:138