Feature/UX: add Enter as confirmation for building using Hotkeys

[VariableVince]

Improve input consistency and keyboard-focused play.

We have keyboard hotkeys for units/bombs. Players can use Esc key to cancel it. But they can't use Enter to confirm the build. To confirm, they need to click the mouse button.

So add Enter as a confirm button after using a Hotkey to select a building.

This makes keyboard-only play more attainable although keyboard+mouse is still probably the best for desktop play.

[wozniakpl]

I can take that

[wozniakpl]

#3317 (comment)

Some hotkeys are displayed there with an icon, an Esc and Enter icon of the same style could be added.

For enter I think ↵ would be suitable. And for escape... Maybe this? ⎋

But I think escape also looks nice without an icon.

WDYT?

[VariableVince]

#3317 (comment)

Some hotkeys are displayed there with an icon, an Esc and Enter icon of the same style could be added.

For enter I think ↵ would be suitable. And for escape... Maybe this? ⎋

But I think escape also looks nice without an icon. WDYT?

The second one looks the best, Esc doesn't need an icon per se indeed but Enter is sometimes called Return and the icon is more universally understood

[wozniakpl]

Ok, so here I have these changes: wozniakpl#1

So next could be:

• merging this Enhance InputHandler to allow using NumPad #3317
• changing base for Add hotkey descriptions for Escape and Enter actions in HelpModal wozniakpl/OpenFrontIO#1 and merging

[VariableVince]

So next could be:

• merging this Enhance InputHandler to allow using NumPad #3317
• changing base for Add hotkey descriptions for Escape and Enter actions in HelpModal wozniakpl/OpenFrontIO#1 and merging

Sounds good. Now i'm no maintainer/reviewer so it's up to them to assess the PRs