Add indent and outdent toolbar buttons

[kmantel]

Use commands 'tabAndIndentMarkdownList' and
'shiftTabAndUnindentMarkdownList' assigned to keyboard shortcuts.

[kmantel]

Solves #232

[Ionaru]

Thank you for the contribution!

It all looks good to me except for one small thing: the placement of the buttons when enabled is maybe a little strange. I'd expect them closer to (maybe next to?) the unordered-list and ordered-list buttons like they are in MS Word.

I'll leave the choice to you, just say "merge" and I'll click merge. :)

LGTM

[kmantel]

Thank you for the contribution!

It all looks good to me except for one small thing: the placement of the buttons when enabled is maybe a little strange. I'd expect them closer to (maybe next to?) the unordered-list and ordered-list buttons like they are in MS Word.

I'll leave the choice to you, just say "merge" and I'll click merge. :)

LGTM

I just added everything to the end, so it wasn't a calculated choice. Do you mean this part setting the default toolbar?

https://github.com/kmantel/easy-markdown-editor/blob/4d35093129d6388a955ab85a473167b9f24e09a7/src/js/easymde.js#L1705-L1718

   'indent': {
        name: 'indent',
        action: indent,
        className: iconClassMap['indent'],
        noDisable: true,
        title: 'Indent',
    },
    'outdent': {
        name: 'outdent',
        action: outdent,
        className: iconClassMap['outdent'],
        noDisable: true,
        title: 'Outdent',
    },

I don't mind moving them between whatever elements you prefer.

[kmantel]

And I have been using outdent to the left of indent like in that image, so I'll change that as well.