RAL must contain a positive numeric

[manugentile]

RAL must be a positive numeric

Description

It's possibile to insert a not-numeric char as a RAL, whilst it should accept numbers or numbers and k (for thousands)

To reproduce

Steps to reproduce the behavior:

1. Start a new chat with the bot
2. Send the /start command
3. Send the /postjoboffer command
4. Answer first 2 questions
5. When asked about the RAL answer with '+' or another not-numeric char

Expected behaviour

The expected behaviour is the bot still asking for the RAL being positive and greater than 0, like it does when setting an unproper job link

Screenshots

Additional context

Using Telegram for Android v10.4.5 (4205) store bundled arm64-v8a on a Poco X3 with English language

[create-issue-branch]

Branch bug/elgorditosalsero/RAL-must-contain-a-positive-numeric created!