Plus button urls is blocked when editing networks

[spylogsster]

Description

Plus button for RPC urls is blocked when editing networks

Steps to Reproduce

1. Add custom network
2. Double click to edit
3. Check "+" button for RPS urls

Actual result:

The button is blocked

Expected result:

The button is unblocked

Reproduces how often:

100%

Brave version (brave://version info)

Version/Channel Information:

• Can you reproduce this issue with the current release?
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the nightly channel?

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information:

[LaurenWags]

Verified passed with

Brave | 1.34.68 Chromium: 97.0.4692.56 (Official Build) beta (x86_64)
-- | --
Revision | 04da6c66398ca50e603cc236a07dc7dfd3bbc750-refs/branch-heads/4692@{#990}
OS | macOS Version 11.6.1 (Build 20G224)

Verified STR and test plan from brave/brave-core#11273 (comment).
Confirmed when editing a custom network the "+" for RPC URLs field is visible and can be clicked on.

[srirambv]

Verification passed on

Brave	1.34.77 Chromium: 97.0.4692.56 (Official Build) (64-bit)
Revision	04da6c66398ca50e603cc236a07dc7dfd3bbc750-refs/branch-heads/4692@{#990}
OS	Windows 11 Version Dev (Build 22523.1000)

• Verified steps from brave/brave-core#11273
• Verified editing a custom network shows the + button for adding a new RPC URL
• Verified clicking on the + button in edit mode hides the button for adding a new URL
• Verified adding a valid URL brings back the + button to focus

Windows.mov

---

Verification passed on

Brave	1.34.77 Chromium: 97.0.4692.56 (Official Build) (64-bit)
Revision	04da6c66398ca50e603cc236a07dc7dfd3bbc750-refs/branch-heads/4692@{#990}
OS	Linux

• Verified steps from brave/brave-core#11273
• Verified editing a custom network shows the + button for adding a new RPC URL
• Verified clicking on the + button in edit mode hides the button for adding a new URL
• Verified adding a valid URL brings back the + button to focus

Linux.mp4