Add delete button to the map editor

(cherry picked from commit f820adab51734020600d9758c4b78a1f6585b133)

mods/cnc/chrome/editor.yaml

@@ -634,7 +634,7 @@ Container@EDITOR_WORLD_ROOT:
 							Height: 25
 							Font: Bold
 							Align: Left
-							Text: label-copy-filters
+							Text: label-selection-filters
 						Checkbox@COPY_FILTER_TERRAIN_CHECKBOX:
 							X: 7
 							Y: 70
@@ -688,6 +688,13 @@ Container@EDITOR_WORLD_ROOT:
 							Width: 55
 							Height: 22
 							Align: Left
+						Button@SELECTION_DELETE_BUTTON:
+							X: 7
+							Y: 222
+							Width: 75
+							Height: 25
+							Text: button-delete-area.label
+							Font: Bold
 						Button@SELECTION_CANCEL_BUTTON:
 							X: 208
 							Y: 222

mods/cnc/fluent/chrome.ftl

@@ -66,7 +66,7 @@ label-area-selection = Area Selection
 label-area-info = Area Info
 label-selected-area-diagonal = Diagonal:
 label-selected-area-resources = Resources:
-label-copy-filters = Copy Filters
+label-selection-filters = Filters
 label-filter-terrain = Terrain
 label-filter-resources = Resources
 label-filter-actors = Actors
@@ -85,6 +85,9 @@ button-map-editor-tab-container-actors-tooltip = Actors
 button-map-editor-tab-container-tools-tooltip = Tools
 button-map-editor-tab-container-history-tooltip = History
 
+button-delete-area =
+   .label = Delete
+
 button-editor-world-root-copy =
    .label = Copy
    .tooltip = Copy the selected area