Convert settings page design into material

[anandsinghparihar]

Closes #582

[coveralls]

Coverage decreased (-0.3%) to 46.165% when pulling 27ee5a2 on anandsinghparihar:setting_page_design into cbd7582 on particl:dev.

[coveralls]

Coverage decreased (-0.3%) to 46.165% when pulling 3d52189 on anandsinghparihar:setting_page_design into cbd7582 on particl:dev.

[AllienWorks]

I propose a new structure for the Settings page:

• move Main > Staking, Transactions to separate tab (Main page is already crowded as it is..)
• move whole Window to Main tab (too little options for own page)
• add info to Help tab as per Help/Support page needed #540
• add About page, which could contain some credits to used tech/code, current version display etc. & possibly even contributors ;)

What do you think?

[coveralls]

Coverage increased (+0.09%) to 46.52% when pulling a93fb58 on anandsinghparihar:setting_page_design into cbd7582 on particl:dev.

[AllienWorks]

Current preview: https://i.imgur.com/btjvUPY.mp4 (available also as a 10MB GIF :)

TODO

• quite a lot the settings still needs to be connected to backend; I haven't tested all, but many of those don't work
• we'll need to review all the items and hide the irrelevant (e.g. Secure messaging, which AFAIK isn't available anywhere in the GUI yet)
• add a lot of stuff (from the top of my head stuff related to Cold staking etc.)
• proof-reading and someone to actually come up with senseful descriptions and help texts! :)

[coveralls]

Coverage decreased (-0.06%) to 46.374% when pulling 2c6bbd0 on anandsinghparihar:setting_page_design into cbd7582 on particl:dev.

[coveralls]

Coverage decreased (-0.2%) to 45.375% when pulling d2c04de on anandsinghparihar:setting_page_design into 7e7ae66 on particl:dev.

[kewde]

Going to merge, better to have this in the codebase.
I've hidden the settings page for now

[AllienWorks]

@kewde yes please, the merge of this is long overdue. I've defined some SCSS templates etc. which I would like to use globally in app. So by me yes, definitely merge this :)