UI polish and signed-tx colour fix (v0.3.3)

Fix and refine the BAL plugin GUI without changing business logic:

core/will.py: restore the PUSHED requirement in needs_server_check so a
signed-but-not-broadcast will is no longer server-queried and therefore
stays blue (COMPLETE) instead of turning red (CHECK_FAIL). This matches the
original Gitea check() condition.

gui/qt/widgets.py: WillSettingsWidget vertical layout now caps every row to
the widest date-row width and left-aligns them; the leading icons keep their
original HelpButton width.

gui/qt/lists.py + gui/qt/common.py: the wizard toolbar button now shows a
28x28 icon plus a bold 'Create your will' caption (QSize imported).

gui/qt/dialogs.py (BalBuildWillDialog):
- closing summary row labelled 'All done: Ok' with a blank separator above it;
- 'checking variables' capitalised to 'Checking variables' (redundant trailing
  colon dropped);
- final auto-closing countdown replaced by an explicit right-aligned 'Close'
  button; intermediate technical pauses kept; next-steps popup preserved.

gui/qt/window.py + core/plugin_base.py: guide show_message on build, and
sync_hide_filters() in update_all so hide flags refresh immediately.

tests: test_needs_server_check updated; added offscreen preview helpers.
Version bumped to 0.3.3. 186 tests pass; ruff clean (baseline only).

bal/gui/qt/lists.py

@@ -457,13 +457,19 @@ class PreviewList(MyTreeView, MessageBoxMixin):
         menu.addAction(_("Check"), self.check)
         menu.addAction(_("Invalidate"), self.invalidate_will)
 
-        wizard = QPushButton()
+        # The Wizard is the main entry point to create an inheritance, so make
+        # it stand out: show a bold label next to a slightly larger icon (the
+        # plain icon-only button was too easy to overlook).
+        wizard = QPushButton("  " + _("Create your will"))
         wizard.setIcon(
             read_QIcon_from_bytes(
                 self.bal_window.bal_plugin.read_file("icons/wizard.png")
             )
         )
-        # Tooltip so the icon is self-explanatory when hovered.
+        wizard.setIconSize(QSize(28, 28))
+        wizard.setMinimumHeight(40)
+        wizard.setStyleSheet("QPushButton{font-weight:bold;}")
+        # Tooltip so the button is self-explanatory when hovered.
         wizard.setToolTip(_("Wizard - Build your will"))
         wizard.clicked.connect(self.bal_window.init_wizard)
         # display = QPushButton(_("Display"))