Login Block: Cannot Remove Default Text for Remote Authorization Prompt Message

[mikedotmundy]

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In both the Login (Legacy) and Login Obsidian blocks, the field for Remote Authorization Prompt Message cannot be cleared out. The help text does say this field is optional, but upon clearing the text from it and saving the block settings, the original text "Log in with social account" reappears in the block.## Expected Behavior
Should be able to remove text from Remote Authorization Prompt Message field.## Actual Behavior
Cannot remove text from Remote Authorization Prompt Message field.## Steps to Reproduce

• Go to Admin Tools > Security > Authentication Services
• Enable Facebook (just enter some dummy settings)
• Go to both the Login (Legacy) and the Login Obsidian blocks, enable Facebook as a Secondary Authentication Type, and remove text from Remote Authorization Prompt Message field.
• Save
• See that the default text "Log in with social account" reappears in the block.

Rock Version

en-US## Client Culture Setting
v14.2, v15.0, v16.0

[BrentPirolli]

Confirmed. If you use a space in the field, it strips that out as well and puts in the default text. If you use   however, it works to clear out the default text.

[nairdo]

We're also going to include a data-migration in v16.4 that will add/set any existing block's to use the original default value Log in with social account but this change will now allow the Rock admin to clear out those block's default values.