### Problem description
Currently, the providers use the method `isSavable()` to determine both
if they can use "Save" or "Save as".
This behaviour is problematic because some providers may need to be
saveable but not saveable as: for example the view provider. The
original provider may not allow to be saved.
### Implementation description
I separate these two behaviour by creating another function:
`isDumpable()`, that return true by default but can be overridden by the
provider to return false, if the provider should not be dumped in any
way.
### Additional things
While I was at it, I also marked "export" operations as needing the
"dumpable" flag. That way, we can't accidentally export the whole
address space of a process as base64.
I also added documentation for these some functions in Provider
* sys: Initial effort to replace existing project files with a better system
* sys: Added back marking provider as dirty
* sys: Remove git commit information from project files
* sys: Format data processor save file nicely
* fix: Automatic pattern loading not working correctly
* ui: Added warning popup when closing a provider with modifications
Closes#604
* sys: Fixed build issues
* tests: Removed useless debug logs
* patterns: Updated pattern language
* sys: Added log message when crashing with a signal
* sys: Make sure abnormal termination handlers are being called more reliably
* ui/ux: Initial recreation of the hex editor view
* ui/ux: Added back support for editing cells
* ux: Make scrolling and selecting bytes feel nice again
* ui/ux: Improved byte selecting, added footer
* sys: Make math evaluator more generic to support integer only calculations
* patterns: Moved value formatting into pattern language
* ui/ux: Added Goto and Search popups, improved selection
* ui: Added better tooltips for bookmarks and patterns
* sys: Use worse hex search algorithm on macOS
Sadly it still doesn't support `std::boyer_moore_horsepool_searcher`
* ui: Added back missing events, menu items and shortcuts
* fix: Bookmark highlighting being rendered off by one
* fix: Various macOS build errors
* fix: size_t is not u64 on macos
* fix: std::fmod and std::pow not working with integer types on macos
* fix: Missing semicolons
* sys: Added proper integer pow function
* ui: Added back support for custom encodings
* fix: Editor not jumping to selection when selection gets changed
* ui: Turn Hexii setting into a data visualizer
* sys: Added back remaining shortcuts
* sys: Remove old hex editor files
* sys: Moved more legacy things away from the hex editor view, updated localization
* fix: Hex editor scrolling behaving weirdly and inconsistently
* sys: Cleaned up Hex editor code
* sys: Added selection color setting, localized all new settings
* fix: Search feature not working correctly
* ui: Replace custom ImGui::Disabled function with native ImGui ones
* ui: Fix bookmark tooltip rendering issues
* fix: Another size_t not being 64 bit issue on MacOS
* sys: Initial refactoring of the SharedData class
* sys/pattern: More refactoring, make every provider have its own patterns
* sys: Finished up refactoring. No more SharedData!
* sys: Fixed compile on Unix
* tests: Fixed unit tests
* sys: Moved view and lang files
* pattern: Added assignment operator support to for loops
* tests: Fixed compile issue
