Devtools: Clear geolocation form and reset setting for 'No override' option
Devtools: Clear geolocation form and reset setting for 'No override' option

Before:
1) Selection is lost after re opening devtools
https://imgur.com/a/WFf22zS
2) Selecting 'No override' does not clear the form fields
https://imgur.com/a/ke6wc7q

After:
1) The correct option is selected in the combo box if a predefined location was selected.
2)'No override' clears the form fields and the settings, so next time devtools are opened the 'No override' is respected.
https://imgur.com/a/WdUtbAg

Bug: 670554
Change-Id: Ibadb2e0b8e46023f7558932436edaeecfae76e06
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2156004
Reviewed-by: Vidal Diazleal <335057fdcb453cd6c3610dd9d7c799602ff689e0@microsoft.com>
Reviewed-by: Robert Paveza <7787129de3d0cb4911c68d958db3023863584560@microsoft.com>
Commit-Queue: Jose Leal <49360abdd51ad00da751c3d448c2dbea47853f27@microsoft.com>

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