Work around Adw.Breakpoint errors

Author: rmader

src/Dialogs/Composer/Dialog.vala

@@ -341,7 +341,7 @@ public class Tuba.Dialogs.Composer.Dialog : Adw.Dialog {
 			Adw.BreakpointConditionLengthType.MAX_WIDTH,
 			400, Adw.LengthUnit.SP
 		);
-		var breakpoint = new Adw.Breakpoint (condition);
+		var breakpoint = new Adw.Breakpoint (condition.copy());
 		breakpoint.add_setter (this, "is-narrow", true);
 		add_breakpoint (breakpoint);
 

src/Views/Admin/Pages/Accounts.vala

@@ -53,7 +53,7 @@ public class Tuba.Views.Admin.Page.Accounts : Views.Admin.Page.Base {
 			Adw.BreakpointConditionLengthType.MAX_WIDTH,
 			450, Adw.LengthUnit.SP
 		);
-		var breakpoint = new Adw.Breakpoint (condition);
+		var breakpoint = new Adw.Breakpoint (condition.copy());
 		breakpoint.add_setter (revealer_box, "halign", Gtk.Align.FILL);
 		breakpoint.add_setter (entry_box_1, "orientation", Gtk.Orientation.VERTICAL);
 		breakpoint.add_setter (entry_box_2, "orientation", Gtk.Orientation.VERTICAL);

src/Views/TabbedBase.vala

@@ -101,7 +101,7 @@ public class Tuba.Views.TabbedBase : Views.Base {
 
 		if (this.current_breakpoint != null) remove_breakpoint (this.current_breakpoint);
 		this.small = true;
-		var breakpoint = new Adw.Breakpoint (condition);
+		var breakpoint = new Adw.Breakpoint (condition.copy());
 		breakpoint.add_setter (this, "title-stack-page-visible", true);
 		breakpoint.add_setter (switcher_bar, "reveal", true);
 		add_breakpoint (breakpoint);