WD-8617 - fix: Fix displaying the first colorless part of the message in WebCLI

[vladimir-cucu]

Done

• Issue resolved: Until now, if the content in the WebCLI started straight away with a color, we displayed twice the beginning of the content. The second time it was displayed without color and with the color encoding appended to it (see screenshots).

Details

• https://warthogs.atlassian.net/browse/WD-8617

Screenshots

Before: After:

[webteam-app]

Demo starting at https://juju-dashboard-1697.demos.haus

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (0559f36) 95.07% compared to head (8775719) 95.13%. Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1697 +/- ## ========================================== + Coverage 95.07% 95.13% +0.06% ========================================== Files 183 183 Lines 5359 5369 +10 Branches 1555 1568 +13 ========================================== + Hits 5095 5108 +13 + Misses 243 241 -2 + Partials 21 20 -1 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.