Create Component from Folder doesn't trim suggested name to last portion of the path on Windows

[datho7561]

To reproduce:

• Use Windows
• Open a project without a devfile as a workspace (eg. run the "Add folder to workspace" command, then select a sample project without a devfile)
• Right click on the folder, and select "Create Component from Folder"

expected: the "component name" field is populated with the folder name

actual: the "component name" is populated with the absolute path of the folder, using a Windows-style path (with drive letter and \)

[rgrunber]

Speaking of component name, could we try to sanitize the initial component name for git repo imports :

vscode-openshift-tools/src/webview/create-component/pages/fromExistingGitRepo.tsx

Line 415 in 843dca5

initialComponentName={gitURL.url.substring(gitURL.url.lastIndexOf('/') + 1)}

so that they respect

vscode-openshift-tools/src/webview/common-ext/createComponentHelpers.ts

Lines 95 to 99 in 843dca5

	validationMessage = OpenShiftItem.validateMatches(
	`Not a valid component name.
	Please use lower case alphanumeric characters or '-', start with an alphabetic character, and end with an alphanumeric character`,
	name,
	);

. Can be included in a separate PR.

(eg. https://github.com/openshift-evangelists/Wild-West-Frontend fails validation )