software/theia: use vscode/git instead of theia/git

To have the timeline view

software/theia/buildout.hash.cfg

@@ -47,7 +47,7 @@ md5sum = 9e8c17a4b2d802695caf0c2c052f0d11
 
 [yarn.lock]
 _update_hash_filename_ = yarn.lock
-md5sum = a9d13a6e760b1942119dc5bbebfcc2b4
+md5sum = 18e8302b2acff3721cad23d829e3df55
 
 [python-language-server-requirements.txt]
 _update_hash_filename_ = python-language-server-requirements.txt

software/theia/download-plugins.cfg

@@ -13,6 +13,7 @@ urls = vscode-bat https://open-vsx.org/api/vscode/bat/1.54.3/file/vscode.bat-1.5
 	vscode-docker https://open-vsx.org/api/vscode/docker/1.54.3/file/vscode.docker-1.54.3.vsix a4e3cdd03833fe6bf3f5045fc5be4433
 	vscode-emmet https://open-vsx.org/api/vscode/emmet/1.54.3/file/vscode.emmet-1.54.3.vsix 5786c95921794ed3188083a7f804fa29
 	vscode-fsharp https://open-vsx.org/api/vscode/fsharp/1.54.3/file/vscode.fsharp-1.54.3.vsix 028f4ec9593533ce38603032b3f2821e
+	vscode-git https://open-vsx.org/api/vscode/git/1.54.3/file/vscode.git-1.54.3.vsix da2f2c0626b4a254a660ae20b0c97611
 	vscode-go https://open-vsx.org/api/vscode/go/1.54.3/file/vscode.go-1.54.3.vsix 9f095a75e4137079351150722d091256
 	vscode-groovy https://open-vsx.org/api/vscode/groovy/1.54.3/file/vscode.groovy-1.54.3.vsix 7ae14c40786311fda29059178f30c310
 	vscode-grunt https://open-vsx.org/api/vscode/grunt/1.54.3/file/vscode.grunt-1.54.3.vsix f7894259f1fa60e939ff2d9b49138a02

software/theia/generate_download_plugins_cfg.py

@@ -17,6 +17,7 @@ for plugin_and_version in '''\
     vscode/docker/latest
     vscode/emmet/latest
     vscode/fsharp/latest
+    vscode/git/latest
     vscode/go/latest
     vscode/groovy/latest
     vscode/grunt/latest

software/theia/software.cfg

@@ -309,7 +309,6 @@ template =
           "@theia/file-search": "latest",
           "@theia/filesystem": "latest",
           "@theia/getting-started": "latest",
-          "@theia/git": "latest",
           "@theia/keymaps": "latest",
           "@theia/markers": "latest",
           "@theia/messages": "latest",