:feat: (electron) show 'create demo budget' button on all envs

[MatissJanis]

Why?

I'm working on publishing the electron (desktop) app to App Store (OSX). Later potentially to other app-stores too.

When a user first opens up an app that he has installed - he sees the configuration screen. But there is no way to actually test the app properly. You could create an empty budget.. but testing that way will not be great UX.

So I am proposing here to always show the "create demo budget" button on the first screen of the app.

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[github-actions]

Bundle Stats — desktop-client

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Files count	Total bundle size	% Changed
15	3.08 MB → 3.08 MB (-13 B)	-0.00%

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File	Δ	Size
src/components/manager/ConfigServer.tsx	📉 -60 B (-0.80%)	7.33 kB → 7.27 kB

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Asset	File Size	% Changed
static/js/main.js	1.43 MB → 1.43 MB (-13 B)	-0.00%

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Asset	File Size	% Changed
static/js/665.chunk.js	824.28 kB	0%
static/media/Inter-italic.var.woff2	239.29 kB	0%
static/media/Inter-roman.var.woff2	221.86 kB	0%
static/js/231.chunk.js	117.38 kB	0%
static/js/wide-components.chunk.js	112.37 kB	0%
static/js/reports.chunk.js	77.81 kB	0%
static/js/narrow-components.chunk.js	42.42 kB	0%
static/js/553.chunk.js	13.14 kB	0%
static/js/473.chunk.js	13 kB	0%
static/js/resize-observer-polyfill.chunk.js	8.88 kB	0%
static/css/main.css	7.41 kB	0%
asset-manifest.json	1.92 kB	0%
index.html	1.66 kB	0%
static/media/browser-server.js	911 B	0%

[github-actions]

Bundle Stats — loot-core

Hey there, this message comes from a GitHub action that helps you and reviewers to understand how these changes affect the size of this project's bundle.

As this PR is updated, I'll keep you updated on how the bundle size is impacted.

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Files count	Total bundle size	% Changed
2	2.23 MB	0%

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kcab.worker.js	1.24 MB	0%
xfo.xfo.kcab.worker.js	1014.45 kB	0%