Review/Cleanup current TODO/FIXMEs in the code

[acmeplus]

Review all the pending TODOs and FIXMEs. If they are no longer valid, remove, otherwise open a ticket to properly track them as issues.

[alpgarcia]

An initial list to review based on my branch:

git grep -n "TODO"

include/Settings.h:164:        // TODO: need to add the logic to override a core/launcher per rom
include/Settings.h:209:        // TODO: need to add the logic to override a core/launcher per rom
resources/config/x86/.simplemenu/alias_PICO-8.txt:1204:17200=TODO
src/Configuration.cpp:100:    // TODO exceptions  ptree_bad_path, ptree_bad_data, both from ptree_error 
src/Configuration.cpp:105:    // TODO exceptions  ptree_bad_path, ptree_bad_data, both from ptree_error
src/Configuration.cpp:118:    // TODO exceptions  ptree_bad_path, ptree_bad_data, both from ptree_error
src/Configuration.cpp:148:    // TODO Do we really need to convert to int and then again to string?
src/I18n.cpp:48:    // TODO exceptions  ptree_bad_path, ptree_bad_data, both from ptree_error 
src/RenderComponent.cpp:197:        // TODO replace clipWidth the correct width based on theme.ini settings
src/Settings.cpp:31:    // TODO should the observer attach itself instead?
src/Settings.cpp:50:    // TODO should the observer attach itself instead?
src/Settings.cpp:70:    // TODO should the observer attach itself instead?
src/Settings.cpp:505:    // TODO one possible improvement here is not to reload everything but
src/Theme.cpp:40:        // TODO fire an exception?

git grep -n "FIXME"

src/RenderComponent.cpp:179:    // Calculate number of pages FIXME: move that to the constructor
src/RenderComponent.cpp:283:    int settingsFontSize = 32;//FIXME: size needs to be dynamic
src/RenderComponent.cpp:293:    int titleFontSize = 64;//FIXME: size needs to be dynamic
src/RenderComponent.cpp:302:    // FIXME: these values need to be dynamic depending on the resolution
src/RenderComponent.cpp:308:    // Calculate number of pages FIXME: move that to the constructor
src/RenderComponent.cpp:348:        // FIXME: replace with proper string once i18n is implemented
src/RenderComponent.cpp:369:    int settingsFontSize = 32; //FIXME: size needs to be dynamic
src/RenderComponent.cpp:379:    int titleFontSize = 64; //FIXME: size needs to be dynamic
src/RenderComponent.cpp:389:    // FIXME: these values need to be dynamic depending on the resolution
src/RenderComponent.cpp:395:    // Calculate number of pages FIXME: move that to the constructor
src/RenderComponent.cpp:446:    int settingsFontSize = 32; //FIXME: size needs to be dynamic
src/RenderComponent.cpp:456:    int titleFontSize = 64; //FIXME: size needs to be dynamic
src/RenderComponent.cpp:466:    // FIXME: these values need to be dynamic depending on the resolution
src/RenderComponent.cpp:472:    // Calculate number of pages FIXME: move that to the constructor
src/Settings.cpp:299:    // FIXME: add boundaries (e.g. min: 0, max: 100)
src/Settings.cpp:310:    // FIXME: add boundaries (e.g. min: 0, max: 100)
src/Settings.cpp:320:    // FIXME: add boundaries (e.g. min: 0, max: 100)