Added persistent unique ids to all elements

I18N Commander/DataModel/Database/Section.cs

@@ -6,6 +6,8 @@ public sealed class Section
 {
     [Key]
     public int Id { get; set; }
+    
+    public Guid UniqueId { get; set; }
 
     public string Name { get; set; } = string.Empty;
 

I18N Commander/DataModel/Database/Setting.cs

@@ -7,6 +7,8 @@ public sealed class Setting
     [Key]
     public int Id { get; set; }
 
+    public Guid UniqueId { get; set; }
+
     public string Code { get; set; } = string.Empty;
 
     public string TextValue { get; set; } = string.Empty;

I18N Commander/DataModel/Database/TextElement.cs

@@ -6,6 +6,8 @@ public sealed class TextElement
 {
     [Key]
     public int Id { get; set; }
+    
+    public Guid UniqueId { get; set; }
 
     public string Name { get; set; } = string.Empty;
     

I18N Commander/DataModel/Database/Translation.cs

@@ -3,6 +3,8 @@
 public sealed class Translation
 {
     public int Id { get; set; }
+    
+    public Guid UniqueId { get; set; }
 
     public TextElement TextElement { get; set; }