Clan update and create message validations

[beckpaul]

Edit error messages for clan creation/updating to address #528

We may not need the error regarding an empty descriptions as:

title='description',
required='required',

Handles empty for us natively but there no harm in maintaining both errors.

Also included

• Some styling for the buttons to create and update the clan (see images)
  • Re-add unusused class
  • apply same class to the update button (see screenshots - mostly a top margin change)
• English change on clan description
  • The description players will see when they look your clan
  • Becomes: The description players will see when they view your clan

Before:

After:

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (7f8d01b) 41.17% compared to head (6e67c32) 41.17%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #531 +/- ## ======================================== Coverage 41.17% 41.17% ======================================== Files 71 71 Lines 1734 1734 Branches 210 210 ======================================== Hits 714 714 Misses 988 988 Partials 32 32 ```

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[fcaps]

@beckpaul if you add: closes #528

merging the pr will automatically close the issue.