Bounty creation flow: mobile UI fixes

[willsputra]

List of mobile UI fixes: ("Mobile UI fixes" page) https://www.figma.com/file/8AFLrc4dx9xnMXUkWOAaAR/Existing-Bounties-Updates?node-id=552%3A1013

[nutrina]

Fixes have been implemented, deployment is pending.

[nutrina]

This was implemented, please provide feedback. Difference to what was requested:

• number of columns used for the bounty type is adjusted dynamically, depending on available space
• text overflow is hidden for bounty description placeholder

[GTChase]

@willsputra can you mvoe this to ready for prod column whenever you sign off on it?

[gitcoinbot]

Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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[gitcoinbot]

Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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Work for 0.0001 ETH (0.25 USD @ $2878.17/ETH) has been submitted by:

1. @funder2

@root please take a look at the submitted work:

• PR by @funder2

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[willsputra]

lgtm! moving it to ready for prod