Add ability to trim the value from <Input> (#3333)

- If set (default = false) then the input will be trimmed of whitespace
  before validation and before submit

- Use trim on all input's that use the systemName validator

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/renderer/components/+preferences/add-helm-repo-dialog.tsx

@@ -177,6 +177,7 @@ export class AddHelmRepoDialog extends React.Component<Props> {
               <Input
                 autoFocus required
                 placeholder="Helm repo name"
+                trim
                 validators={systemName}
                 value={this.helmRepo.name} onChange={v => this.helmRepo.name = v}
               />