Add ESC key support to cancel/clear tile selections

[Copilot]

Closes #XXXX

This PR implements ESC key handling for tile tools, allowing users to cancel ongoing selections or clear existing selections by pressing ESC, improving UX consistency with object selection behavior.

Problem

Previously, users had to either:

• Click outside the map area, or
• Use the keyboard shortcut Shift+Cmd+A (Select None)

to clear or cancel tile selections. This was unintuitive and inconsistent with object selection, which has supported ESC since commit 4b3c0a2.

Solution

Added keyPressed method overrides with context-aware, two-level ESC handling:

1. Cancel ongoing selection - When actively dragging to select (TileSelectionTool only)
2. Clear existing selection - When a selection exists (works with ANY tile tool, not just selection tools)

This matches the behavior pattern already established in ObjectSelectionTool.

Implementation

AbstractTileTool

Added keyPressed method that clears the selected area when ESC is pressed:

• Checks if a tile selection exists
• Creates a ChangeSelectedArea command with an empty region
• Pushes to undo stack (making the action undoable with Ctrl+Z)

This base implementation automatically benefits ALL tile tools, including:

• Stamp Brush - Paint tiles
• Bucket Fill - Fill connected areas
• Shape Fill - Draw shapes
• Eraser - Erase tiles
• TileSelectionTool - Rectangular select
• MagicWandTool - Select connected similar tiles
• SelectSameTileTool - Select all instances of a tile
• Any future tile tools

TileSelectionTool

Extended with custom keyPressed to handle canceling in-progress selections:

• First checks if actively selecting (dragging with mouse)
• If yes: Cancels the selection action by resetting state and clearing the brush preview
• If no: Defers to AbstractTileTool to clear any existing selection

Usage Examples

Scenario	User Action	Result
While dragging to select	Press ESC	Selection preview disappears, action cancelled
Using Stamp Brush with selection	Press ESC	Selection cleared (can undo with Ctrl+Z)
Using Bucket Fill with selection	Press ESC	Selection cleared
Using Shape Fill with selection	Press ESC	Selection cleared
Using Magic Wand	Press ESC	Selection cleared
Using Select Same Tile	Press ESC	Selection cleared
No selection exists	Press ESC	Nothing happens

Benefits

• ✅ Intuitive ESC key behavior matching user expectations
• ✅ Consistent with object selection tools
• ✅ Works with ALL tile tools, not just selection tools
• ✅ Context-aware (cancel vs clear based on state)
• ✅ Properly integrated with undo/redo system
• ✅ No breaking changes
• ✅ Minimal code changes

Fixes #4243

Original prompt

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This section details on the original issue you should resolve

<issue_title>[Suggest] press ESC to cancel the selected range.</issue_title>
<issue_description>### Is your feature request related to a problem? Please describe.

If I've used the select rect tool or use CMD+A to select a range on the map , then I want to cancel the select range I have to click somewhere that out of map area of use shift + cmd + a
Sometimes it's not a good way . I hope tiled could support use press ESC key to cancel the selected range.

Describe the solution you'd like.

use press ESC key to cancel the selected range.

Describe alternatives you've considered.

No response</issue_description>

Comments on the Issue (you are @copilot in this section)

@bjorn

You can change the keyboard shortcut of Select None from Shift+Cmd+A to Esc in Edit > Preferences > Keyboard.

I wonder if it should do that by default regardless of the bound shortcut, because I think such behavior could be expected based on other applications and it would be consistent with object selection, which also clears on Esc since 4b3c0a2.</comment_new>
<comment_new>@bjorn

I haven't tested the behaviour of object selection Esc, but I'd hope it only works under similar restrictions.

Yes, that handling of Esc is context-sensitive, so you could even press Esc three times and it would do:

• Cancel object creation
• Switch back to Select Objects tool
• Clear object selection

There might be similarly multiple uses of Esc for tile layer related tools, not sure. But we can at least start by handling Esc to clear selection. I'd have to check what happens when one of the actions is also bound to Esc.</comment_new>

Fixes #4243

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[bjorn]

@copilot This way, the tile selection can't be cleared using Escape when any other tile-related tool is selected. Hence, please move the handling of Escape to clear the tile selection from the AbstractTileSelectionTool to the AbstractTileTool.

[Copilot]

@copilot This way, the tile selection can't be cleared using Escape when any other tile-related tool is selected. Hence, please move the handling of Escape to clear the tile selection from the Abstrac...

Done. Moved the ESC handling to AbstractTileTool so it works with any tile-related tool. Commit: 7e82f73