disable save button on key/value length limit reached #7

[d47081]

I've dream about this feature for a long time and finally implemented!

• [x] Send button deactivation on limits reached
• [x] Length counter for key / values
• [x] Colorized highlight (green / red) or hidden on empty

This and other all PR also included to kvazar branch at: https://github.com/kvazar-network/kevacoin/tree/kvazar

Still sending contributions here anyway!

[d47081]