(Feature) Allow min cap manage screen

[fernandomg]

Closes #930

I wasn't able to update minCap after crowdsale creation.

I tried with and without setting an initial minCap value in the crowdsale creation process.

Please @vbaranov review

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Besides, @dennis00010011b manage screen layout has slightly changed, so it is possible that e2e test fails.

[dennis00010011b]

4. Error message if globalMinCap === ""

[dennis00010011b]

5. There is no validation if minCap > totalSupply
6. Manage page isn't rendered for Dutch

[fernandomg]

@dennis00010011b @vbaranov fixes done, thanks!

Still cannot update minCap, did you guys were able to do it?

[dennis00010011b]

@fernandomg There is still issue, can't add whitelist from manage page. Decimals =18

[dennis00010011b]

2. There is no validation if minCap >totalSupply
3. In case if all tiers are whitelisted field minCap should be always disabled
4. minCap enabled if crowdsale not modifiable

Yes, I can't update minCap too

[fernandomg]

In case if all tiers are whitelisted field minCap should be always disabled

fixed

can't add whitelist from manage page. Decimals =18

fixed

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There is no validation if minCap >totalSupply

If that's the case, the crowdsale creation process is wrong as well, because if you enable whitelists for only one tier, minCap is disabled and set to zero.

minCap enabled if crowdsale not modifiable

Thinking a bit further, rule should be: if all tiers without whitelist enabled are not modifiable, then minCap should not be modifiable either.

Please @dennis00010011b @vbaranov confirm the last two items.

[dennis00010011b]

@fernandomg There is still issue: minCap field disabled even if tier modifiable, no whitelisted

I think since each tier has own allowModifiy and enableWhitelisted flags then minCap also should be a property of a tier. But these feature doesn't implemented in auth_os yet. Now we have an unambigvious situation with mincap for multitier crowdsale because some tiers can be modifiable some not. May be better to disable modify minCap from manage page for multitier crowdsale and enable it only for single tier crowdsale

[vbaranov]

@dennis00010011b @fernandomg

I guess the rule on the management page could be the same as in step 3 of deployment process:

global min cap is disabled if any of a tier is whitelisted. If none of the tiers is whitelisted, global min cap is enabled and should be less than total crowdsale supply.

[fernandomg]

@dennis00010011b @vbaranov

minCap is editable only if there's no whitelist, and it cannot be greater than the minimum supply for the tiers.

[dennis00010011b]

@fernandomg minCap is editable before start if crowdsale isn't modifiable. Should be disabled.

[fernandomg]

minCap is editable before start if crowdsale isn't modifiable

@dennis00010011b Fixed, so if there's at least one editable tier minCap will be editable as well.