Give wheel, palette and navigator a minimum size

So that they can't be squished into oblivion. The minimum size is still
very small to avoid causing trouble for users with dinky resolutions,
but they now no longer at zero, where you could have a dock that's
confusingly just a header.

Relates to #1349.

ChangeLog

@@ -92,6 +92,7 @@ Unreleased Version 2.2.2-pre
  * Fix: Compensate for discontinuity in the classic soft brush radius to make the transition look less bumpy. Thanks BulletPepper for reporting.
  * Feature: Make color sliders dock smaller by showing only one set of sliders at a time and add an input field for a hex color name. Thanks Kawaxte and MorrowShore for suggesting.
  * Fix: Don't switch tools while typing into text fields in some situations. Thanks leopardheart982 for reporting.
+ * Fix: Give color wheel, color palette and navigator docks a minimum size so that they can't be shrunken into nonexistence. Thanks vipperz for reporting.
 
 2024-02-25 Version 2.2.2-beta.1
  * Server Feature: Allow adding a message when kicking someone through the admin API.

src/desktop/docks/colorpalette.cpp

@@ -175,6 +175,7 @@ ColorPaletteDock::ColorPaletteDock(const QString &title, QWidget *parent)
 	choiceLayout->addWidget(menuButton);
 
 	d->paletteWidget = new widgets::PaletteWidget{this};
+	d->paletteWidget->setMinimumHeight(20);
 	layout->addWidget(d->paletteWidget, 1);
 	connect(
 		d->paletteWidget, &widgets::PaletteWidget::colorSelected, this,

src/desktop/docks/colorspinner.cpp

@@ -38,6 +38,7 @@ ColorSpinnerDock::ColorSpinnerDock(const QString& title, QWidget *parent)
 
 	// Create main widget
 	d->colorwheel = new color_widgets::ColorWheel(this);
+	d->colorwheel->setMinimumSize(64, 64);
 	setWidget(d->colorwheel);
 
 	connect(d->colorwheel, &color_widgets::ColorWheel::colorSelected, this, &ColorSpinnerDock::colorSelected);

src/desktop/docks/navigator.cpp

@@ -514,6 +514,7 @@ Navigator::Navigator(QWidget *parent)
 	m_view->addAction(realtimeUpdateAction);
 
 	m_view->setContextMenuPolicy(Qt::ActionsContextMenu);
+	m_view->setMinimumHeight(32);
 
 	auto &settings = dpApp().settings();
 	settings.bindNavigatorShowCursors(showCursorsAction);