Icons missing on the editor tabbar when opening a file from the SCM view

[lmcbout]

Bug Description:

Using GIt-UI and GIT plugins version 1.39.1, there are some commands missing on the editor tabbar. The icons are not present as they are on VSCODE.

On the editor tab, the missings icons are when the file is open in a single editor

- Open changes With Previous revision
- Show Revision details
- Open Changes with Next Revision
- Toggle File Blame annotation 
- More actions

When the editor is showing the diff editor, then other icons are added

- Open File (Alternate with the "Open Changes"
- Previous changes
- Next changes
- Show leading/Trailing Whitespace Differences

Steps to Reproduce:

1. Open the Source control View (Git)
2. Select a modified file in the list
   --> This open the file in diff editor
   -> Observe the icons missing to navigate/execute commands in the editor tabbar
   --> Compare with the icons in VSCODE

Additional Information

• Operating System: Tested on Ubuntu 18.04, but is probably missing on all platforms
• Theia Version: Latest
• GIt /Git-UI version 1.39.1

Theia icons on the editor tabbar

VSCode icon on the tabbar

[akosyakov]

Just to clarify VS Code was tested with git 1.39.1 extension as well? It could be that this extension is simply out-dated?

[lmcbout]

In Theia, git version 1.44.2 from ope-vsx registry does not work right now. On VSCode, this is a different version . This is why I mentioned the version I discovered this issue. When we will be able to upgrade , may be this issue might be gone !

[vince-fugnitto]

@lmcbout the icons you see in vscode come from gitlens not the builtin.
You can test in vscode by running the command Reload with Extensions Disabled:

I see you've included gitlens in your vscode instance, when removed you'll see that the icons are the same.

[lmcbout]

Sorry, @vince-fugnitto found the icons comes from GITLens. Tested it and the icons are available.