Git: Improve upper part of layout

In small screen, General Information and Commit Information fill more
spaces than their importance.
This commit changes their layout from vertical to horizontal.

Change-Id: I919f1ac5fd02f32fda54698b012330ecebbd6ab0
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: André Hartmann <aha_1980@gmx.de>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/gitsubmiteditorwidget.cpp

@@ -37,6 +37,7 @@ public:
     GitSubmitPanel()
     {
         repositoryLabel = new QLabel(Tr::tr("repository"));
+        repositoryLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
         branchLabel = new QLabel(Tr::tr("branch")); // FIXME: Isn't this overwritten soon?
         showHeadLabel = new QLabel("<a href=\"head\">" + Tr::tr("Show HEAD") + "</a>");
 
@@ -64,18 +65,18 @@ public:
 
         editGroup = new QGroupBox(Tr::tr("Commit Information"));
         Grid {
-            Tr::tr("Author:"), authorLineEdit, invalidAuthorLabel, st, br,
+            Tr::tr("Author:"), authorLineEdit, invalidAuthorLabel, br,
             Tr::tr("Email:"), emailLineEdit, invalidEmailLabel, br,
             empty, Row { bypassHooksCheckBox, signOffCheckBox, st }
         }.attachTo(editGroup);
 
-        Column {
+        Row {
             Group {
                 title(Tr::tr("General Information")),
                 Form {
                     Tr::tr("Repository:"), repositoryLabel, br,
                     Tr::tr("Branch:"), branchLabel, br,
-                    Span(2, showHeadLabel)
+                    empty, showHeadLabel
                 }
             },
             editGroup,