[General] add .editorconfig, align text and icons in sidebar, fix sidebar shadow, sidebar css clean up

[dawidgarus]

• Fixed drop shadow of the sidebar so it won't cover foreground elements in the main content
• Aligned icons and labels in the sidebar. All labels start the same amount of pixels from the left now
• Clean up of sidebar code, mostly CSS
• Added .editorconfig - I figured that instead of changing my IDE configuration it's better to create .editorconfig as bonus for every contributor

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Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)

[flavioislima]

Can you add screenshot? Would be good to remove some spacing from the submenu itens.

[dawidgarus]

@flavioislima I've already changed spacing in the submenu items. Here's a screenshot:

I was also considering aligning submenu item labels with top level items but it would cause wrapping of the text for longer entries like unreal marketplace

EDIT: also, submenu for library looks like a submenu for store. Both were using different colors for active item, so I've changed it to accent color (yellow/orange)

[biliesilva]

Is possible to give more margin-left or padding-left to Epic Store and GOG Store? They are submenus of Stores and is a UI convention to have submenus like this. An example for left space (not design, ignore the icon):

[dawidgarus]

@bilianemoreira
I don't see any other submenus in the app, so I'm not sure where that convention comes from.
The problem with huge padding like this (as I mentioned before) is that it may cause text to wrap:

I'm not sure if that's desired behavior.

[flavioislima]

Yes, I believe that we cannot give so much left padding because of some languages, otherwise, it will break words.

[flavioislima]

Good! Thanks for that!