Problem #1 description:
An "Illegal string offset" runtime error is observed when adding a condition to a "Remote command" operation that has already "Host" field populated in "Target list" section.

Steps to reproduce:

1. Navigate to Configuration => Actions and press "Create action"
2. Open "Operations" tab and press "Add" in Operations section
3. In the opened overlay dialogue set "Operation type" to "Remote command"
4. In Target list section select any existing host in field "Host"
5. Press "Add" button in section "Conditions"
6. Press "Add" in the opened overlay dialogue

Result: The following runtime error is observed:

Illegal string offset 'hostid' [zabbix.php:21 -> require_once() -> ZBase->run() -> ZBase->processRequest() -> ZBase->processResponseFinal() -> CView->getOutput() -> include() -> CConfigFile->{closure}() in app/views/popup.operation.common.php:322]

Expected: no runtime errors should be observed.

Problem #2 description:
An "Undefined index" runtime error is observed when adding a "Set host inventory mode" operation to a Discovery action.

Steps to reproduce:

1. Navigate to Configuration => Actions open the list of Discovery actions and press "Create action"
2. Open "Operations" tab and press "Add" in Operations section
3. In the opened overlay dialogue set "Operation type" to "Set host inventory mode"
4. Press "Add" in the operation details overlay dialogue

Result: The following runtime error is observed:

Undefined index: opinventory [zabbix.php:21 -> require_once() -> ZBase->run() -> ZBase->processRequest() -> ZBase->processResponseFinal() -> CView->getOutput() -> include() -> CConfigFile->{closure}() in app/views/popup.operation.common.php:642]

Expected: no runtime errors should be observed.