hius07

It was proposed by @zwim when adding units to the SpinWidget and accepted.

French modules https://github.com/koreader/koreader/blob/81575ae24f4a53158c0f6f65c8e363f5fe5db8e3/frontend/apps/reader/modules/readerfont.lua#L771 https://github.com/koreader/koreader/blob/81575ae24f4a53158c0f6f65c8e363f5fe5db8e3/frontend/ui/data/css_tweaks.lua#L1034 Austrian modules https://github.com/koreader/koreader/blob/81575ae24f4a53158c0f6f65c8e363f5fe5db8e3/plugins/coverimage.koplugin/main.lua#L640-L641 https://github.com/koreader/koreader/blob/81575ae24f4a53158c0f6f65c8e363f5fe5db8e3/plugins/autowarmth.koplugin/main.lua#L977

I think we can (step by step) replace SP% with NNBSP% everywhere. 

But should we keep it translatable? Maybe just append to the translated string? Or that would cause the bidi issue? https://github.com/koreader/koreader/blob/a082d85a0b8cf2ddaa39f4784d3b6b7a080be233/frontend/apps/reader/modules/readerfooter.lua#L1305

May be closed by https://github.com/koreader/koreader/pull/13762. I doubt about too much granulated backup settings, proposing only "main settings", "history", "plugins", "user style tweaks" separation.

Tha paths are not absolute but like ".\history.lua", so should be cross-platform I hope. No cloud so far.

Repeating my comment from the PR thread: I see the following settings related to absolute paths: `download_dir` `clipping_dir` (within Exporter plugin settings) `folder_shortcuts` `home_dir` `inbox_dir` (for Calibre plugin) `screensaver` many...


> Buttons are too narrow vertically It's here. What is a good height? https://github.com/koreader/koreader/blob/6de2a59bd88ec67511e269191addda5e1af2c588/frontend/ui/widget/skimtowidget.lua#L71

> I think the logic is **"Show the note if it exists, otherwise show the higlighted text"**. Exactly.