Disable editor network bootstrap in builds; tune scenes and paint HUD panel

NetworkBootstrap now destroys itself outside the editor. Camera FOV/background
tweaks in Main, lobby light intensity, and paint HUD panel font/color polish.

Assets/Prefabs/PaintHudPanel.prefab

@@ -1627,8 +1627,8 @@ MonoBehaviour:
   m_faceColor:
     serializedVersion: 2
     rgba: 4294967295
-  m_fontSize: 14
-  m_fontSizeBase: 14
+  m_fontSize: 12
+  m_fontSizeBase: 12
   m_fontWeight: 400
   m_enableAutoSizing: 0
   m_fontSizeMin: 18
@@ -4249,8 +4249,8 @@ MonoBehaviour:
   m_faceColor:
     serializedVersion: 2
     rgba: 4294967295
-  m_fontSize: 14
-  m_fontSizeBase: 14
+  m_fontSize: 12
+  m_fontSizeBase: 12
   m_fontWeight: 400
   m_enableAutoSizing: 0
   m_fontSizeMin: 18
@@ -4808,8 +4808,8 @@ MonoBehaviour:
   m_faceColor:
     serializedVersion: 2
     rgba: 4294967295
-  m_fontSize: 14
-  m_fontSizeBase: 14
+  m_fontSize: 12
+  m_fontSizeBase: 12
   m_fontWeight: 400
   m_enableAutoSizing: 0
   m_fontSizeMin: 18
@@ -8095,15 +8095,15 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: UnityEngine.UI::UnityEngine.UI.Image
   m_Material: {fileID: 0}
-  m_Color: {r: 0.1, g: 0.1, b: 0.12, a: 0.92}
+  m_Color: {r: 0.09019608, g: 0.09019608, b: 0.10980392, a: 1}
   m_RaycastTarget: 1
   m_RaycastPadding: {x: 0, y: 0, z: 0, w: 0}
   m_Maskable: 1
   m_OnCullStateChanged:
     m_PersistentCalls:
       m_Calls: []
-  m_Sprite: {fileID: 0}
-  m_Type: 0
+  m_Sprite: {fileID: 10907, guid: 0000000000000000f000000000000000, type: 0}
+  m_Type: 1
   m_PreserveAspect: 0
   m_FillCenter: 1
   m_FillMethod: 4
@@ -8779,8 +8779,8 @@ MonoBehaviour:
   m_faceColor:
     serializedVersion: 2
     rgba: 4294967295
-  m_fontSize: 14
-  m_fontSizeBase: 14
+  m_fontSize: 12
+  m_fontSizeBase: 12
   m_fontWeight: 400
   m_enableAutoSizing: 0
   m_fontSizeMin: 18

Assets/Scenes/Lobby.unity

@@ -1073,7 +1073,7 @@ Light:
   serializedVersion: 12
   m_Type: 1
   m_Color: {r: 1, g: 1, b: 1, a: 1}
-  m_Intensity: 3
+  m_Intensity: 2
   m_Range: 10
   m_SpotAngle: 30
   m_InnerSpotAngle: 21.80208

Assets/Scenes/Main.unity

@@ -468,7 +468,7 @@ MonoBehaviour:
     LookAtTarget: {fileID: 0}
     CustomLookAtTarget: 0
   Lens:
-    FieldOfView: 45
+    FieldOfView: 48
     OrthographicSize: 10
     NearClipPlane: 0.1
     FarClipPlane: 5000
@@ -739,7 +739,7 @@ Camera:
   m_Enabled: 1
   serializedVersion: 2
   m_ClearFlags: 1
-  m_BackGroundColor: {r: 0.13333334, g: 0.2, b: 0.26666668, a: 0}
+  m_BackGroundColor: {r: 0, g: 0, b: 0, a: 0}
   m_projectionMatrixMode: 1
   m_GateFitMode: 2
   m_FOVAxisMode: 0
@@ -762,7 +762,7 @@ Camera:
     height: 1
   near clip plane: 0.1
   far clip plane: 5000
-  field of view: 45
+  field of view: 48
   orthographic: 0
   orthographic size: 10
   m_Depth: -1
@@ -948,7 +948,7 @@ MonoBehaviour:
     LookAtTarget: {fileID: 0}
     CustomLookAtTarget: 0
   Lens:
-    FieldOfView: 45
+    FieldOfView: 52
     OrthographicSize: 10
     NearClipPlane: 0.1
     FarClipPlane: 5000
@@ -1240,7 +1240,7 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: UnityEngine.UI::UnityEngine.UI.RawImage
   m_Material: {fileID: 0}
-  m_Color: {r: 0.26415092, g: 0.26415092, b: 0.26415092, a: 1}
+  m_Color: {r: 0.60784316, g: 0.60784316, b: 0.60784316, a: 0.60784316}
   m_RaycastTarget: 1
   m_RaycastPadding: {x: 0, y: 0, z: 0, w: 0}
   m_Maskable: 1
@@ -1670,7 +1670,7 @@ MonoBehaviour:
     LookAtTarget: {fileID: 0}
     CustomLookAtTarget: 0
   Lens:
-    FieldOfView: 45
+    FieldOfView: 48
     OrthographicSize: 10
     NearClipPlane: 0.1
     FarClipPlane: 5000

Assets/Scripts/NetworkBootstrap.cs

@@ -24,7 +24,16 @@ public class NetworkBootstrap : MonoBehaviour
 
     private NetworkManager _net;
 
-    private void Awake() => _net = GetComponent<NetworkManager>();
+    private void Awake()
+    {
+        if (!Application.isEditor)
+        {
+            Destroy(this);
+            return;
+        }
+
+        _net = GetComponent<NetworkManager>();
+    }
 
     private void Update()
     {