Changes `sendCommandWithCompletion` to return a promise

* Add simple dropdown for hiding graph columns

* Fixed lint errors and cleaned the code

* Modified combobox list to show only the graph columns that can be hidden

* Refactoring: removed "getGraphColConfigModel" function

* Fixed ids/keys prefix used for the columns combo

Co-authored-by: Miggy Eusebio <miggy.eusebio@gitkraken.com>

Refs #2195

Doesn't yet fix the spinners sticking issue

Shows progress indicator while loading autolinks

Fixes progress indicators when loading new rows & other updates happen (e.g. avatars)

Loading the webview without the rows lets us provide feedback (spinners) while the rows are being loaded/processed and also parallelizes the webview initialization (react, component, etc) while git is working

Streams git log data to find specific commit

Adds show in commit graph to hovers

Adds graph.commitOrdering setting