Some fixes in translated strings

- doesn't make sense to translate "%1"
- showPreprocessedFile: "reason" contains full stop, put at the end
- add missing closing >
- remove whitespace at the end of translated string
- added missing quotes and full stops
- Remove some control text from tr

Change-Id: I5537c3d12d038e25e2209af1198129fbf959b43c
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

src/plugins/git/gitsubmiteditorwidget.cpp

@@ -40,7 +40,7 @@ public:
 
         repositoryLabel = new QLabel(Tr::tr("repository"));
         branchLabel = new QLabel(Tr::tr("branch")); // FIXME: Isn't this overwritten soon?
-        showHeadLabel = new QLabel(Tr::tr("<a href=\"head\">Show HEAD</a>")); // FIXME: Simplify string in tr()
+        showHeadLabel = new QLabel("<a href=\"head\">" + Tr::tr("Show HEAD") + "</a>");
 
         authorLineEdit = new QLineEdit;
         authorLineEdit->setObjectName("authorLineEdit");