Add mapping editor (#23427)

* Add mapping editor (#757)

* Remove mapping actions, never again

* Cleanup actions system

* Jarvis, remove all references to CM14

* Fix InventoryUIController crashing when an InventoryGui is not found

* Rename mapping1 to mapping

* Clean up context calls

* Add doc comments

* Add delegate for hiding decals in the mapping screen

* Jarvis mission failed

* a

* Add test

* Fix not flushing save stream in mapping manager

* change

* Fix verbs

* fixes

* localise

---------

Co-authored-by: DrSmugleaf <DrSmugleaf@users.noreply.github.com>
Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>
Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>
Co-authored-by: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>

Content.IntegrationTests/Tests/MappingEditorTest.cs

@@ -0,0 +1,41 @@
+using Content.Client.Gameplay;
+using Content.Client.Mapping;
+using Robust.Client.State;
+
+namespace Content.IntegrationTests.Tests;
+
+[TestFixture]
+public sealed class MappingEditorTest
+{
+    [Test]
+    public async Task StopHardCodingWidgetsJesusChristTest()
+    {
+        await using var pair = await PoolManager.GetServerClient(new PoolSettings
+        {
+            Connected = true
+        });
+        var client = pair.Client;
+        var state = client.ResolveDependency<IStateManager>();
+
+        await client.WaitPost(() =>
+        {
+            Assert.DoesNotThrow(() =>
+            {
+                state.RequestStateChange<MappingState>();
+            });
+        });
+
+        // arbitrary short time
+        await client.WaitRunTicks(30);
+
+        await client.WaitPost(() =>
+        {
+            Assert.DoesNotThrow(() =>
+            {
+                state.RequestStateChange<GameplayState>();
+            });
+        });
+
+        await pair.CleanReturnAsync();
+    }
+}