update README, wiki, used libraries, screenshots, whats new dialog

[deadlocker8]

• README
• wiki
• used libraries (about page)
• screenshots
• what's new dialog

[deadlocker8]

✨ New features

• allow selection of a date range while performing a search search: allow selection of date range #721
• better workflow for changing amount/etc. for repeating transactions better workflow for changing amount/etc. for repeating transactions #722
• show the related transactions for an area by using shift + mouse click in charts clickable chart areas #683

✏️ Improvements

• removed automatic h2 to postgres database migrator remove migrator #713

🐛 Bugfixes

• new template page should not force input of amount new template page should not force input of amount #718
• search: highlight transaction does not color the item correctly search: highlight transaction does not color the item correctly #719
• global account select does not work while a transaction is highlighted global account select does not work while a transaction is highlighted #720
• search for available updates in tomcat is now working search for available updates in tomcat not working #586

⚠️Deprecations

Minimum supported version of BudgetMaster database is now v2.10.0

❗ If you are still using BudgetMaster v2.9.2 or earlier, please make sure to upgrade to v2.10.0 prior to using this release!
Starting with this release the automatic database migrator will nol longer be available to switch from old h2 database backend to postgres. ❗

Minimum supported version for JSON import is now 4

❗ BudgetMaster database exports (JSON files) from version prior to v2.5.0 (version code 3 or less inside the JSON) can no longer be imported ❗