Allow adding empty strings

Fix RedisInsight#4689

Improve Save button

- Remove updated value dialog
- Enable Save button onTextChanged
- Add valueUpdated signal
- Add "saving" state to Save button
- Show saving process indicator

Update translation files

Fix links color

Fix WelcomeTab

Add missing objectId

Scaling fixes

Add HyperLogLog support

Close RedisInsight#3656

Fix layout of BulkOperationsDialog

Fix app icon on linux