fixed default icon font color for templates in light theme

...in/java/de/deadlocker8/budgetmaster/accounts/Account.java

...java/de/deadlocker8/budgetmaster/categories/Category.java

...ain/java/de/deadlocker8/budgetmaster/icon/Iconizable.java

.../java/de/deadlocker8/budgetmaster/templates/Template.java

...in/resources/templates/categories/categoriesFunctions.ftl

src/main/resources/templates/helpers/customSelectMacros.ftl

src/main/resources/templates/helpers/fontColorPicker.ftl

src/main/resources/templates/helpers/iconSelect.ftl

src/main/resources/templates/templates/templateFunctions.ftl