[IMP] module: warning when uninstalling modules

When a module is uninstalled, this will also uninstall modules depending of it. To avoid unexpected loss of data, this patch list the modules that will get impacted during the installation.
This also affects the configuration pages with on change warnings.
web: do not select the first result if click on search more

When searching for a record in a m2o field, if we click on 'search more' we loose the focus on the field and select the first suggestion (which triggers potential on_change). This prevents the selection for this case.