[GUI] alert message of Qualifier asset creation needs to be updated

[lorancecall]

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Describe the issue

Can you reliably reproduce the issue?

If so, please list the steps to reproduce below:

1. select Create Asset tap
2. set asset type = Qualifier Asset
3. enter any name

Expected behaviour

Tell us what should happen

• need to alert user the character must start # followed by 3 character

Actual behaviour

Tell us what happens instead

• It prints out Qualifier name contains invalid characters (Valid characters are: A-Z 0-9 _.) (# must be the first character,_.special characters can't be the first or last characters) instead
• The message did not indicate at least 3 character needed, also not intuitive what would be expected.
• Maybe autofill # will be better if this is 'must be' condition?
• the message does not auto fit with textfield, need to make it can line change when window size is smaller then message.

Screenshots.

If the issue is related to the GUI, screenshots can be added to this issue via drag & drop.

when windows size is wider than text

#### when windows size is narrower than text

What version of Ravencoin are you using?

List the version number/commit ID, and if it is an official binary, self compiled or a distribution package such as PPA.
4.7.0.0-27dec57fc (64bit)

Machine specs:

• OS: OSX BigSur
• CPU: Intel i7 2.9 quad core
• RAM: 16 GB
• Disk size: 500GB
• Disk Type (HD/SDD): SSD

Any extra information that might be useful in the debugging process.

This is normally the contents of a debug.log or config.log file. Raw text or a link to a pastebin type site are preferred.

[fdoving]

Related to #1152